北理工《大学英语(2)》在线作业满分答案
大学英语二在线作业部分答案
业>>单选题1.to make2.be made3.making4.made1.unless2.if3.since4.as long as1.have I realized2.I have realized3.did I realize4.I realized1.relaxing2.relax3.relaxed4.to relax1.shall learn2.should learn3.learn4.learned1.look at2.look up3.look for4.look around1.leave2.left3.has left4.shall leave1.show2.showed3.shall show4.shown1.which2.what3.why4.that1.sequence2.time3.form4.shape1.seeing2.see3.be seeing4.have seen题1.which2.who3.that4.what1.led2.had3.got4.gave1.In many instances2.In much instance3.For many instances4.For much instance1.serious2.silent3.simple4.slight1.that2.which3.who4.what1.which chair should he take2.which chair he should take3.which chair he take4.which chair he took1.where2.when3.which4.that1.be obeyed2.is obeyed3.shall be obeyed4.obeyed1.extend2.explore3.express4.exercise1.would be injured2.will have been injured3.will be injured4.would have been injured1.could2.should3.would4.might1.surf2.to surf3.surfing4.surfed1.No sooner had I2.No sooner I had3.No sooner have I4.No sooner I have1.seeing2.see3.be seeing4.have seen1.write2.wrote3.writing4.written1.on which2.on that3.in which4.on whom1.unless2.as if3.when4.in order that1.look at2.look up3.look for4.look around1.where might be her son2.which might be her son3.where her son might be4.which her son might be1.where2.when3.which4.that1.warned2.warn3.warning4.having warned2：It is high time that you _____ English and computer well.1.shall learn2.should learn3.learn4.learned3：He asked me _______ after graduation?1.what did I intend to do2.what I intended to do3.what did I intend to4.what I intended to4：There have been complaints about the noise from the people ___ live in the flats.1.which2.whom3.whose4.who5：I used to ____ poems when I was his age.1.write2.wrote3.writing4.written6：They tried to think of a plan ____ they could fulfill their taskahead of time.1.by that2.by which3.in that4.in which7：He told me that I______be present at the ceremony.1.could2.should3.would4.might8：I spent all my spare time surfing the Internet. I am absolutely keen ___ it.1.on2.at3.in4.to9：Little______that they had made a great discovery in chemistry.1.they realized2.had they realized3.did they realize4.they had realized10：I can never forget the day ____ I got the first prize in the competition.1.that2.where3.which4.when11：If they were here tomorrow, the problem _____.1.would be solved2.would have been solved3.will be solved4.will have been solved12：If I were you, I ____ the job.1.accept2.accepted3.will accept4.would accept13：In Ireland, as in the rest of Europe, dates are usually written in the _____of day, month, and year.1.sequence2.time3.form4.shape14：The criminal didn’t realize the value of freedom______he had lost it.1.if2.as3.while4.until15：I spent all my spare time ___ the Internet.1.surf2.to surf3.surfing4.surfed16：There are two reasons ____ I do not want to go out tonight.1.why2.because3.so4.that17：The book was different______all the other books I’ve everread.1.from2.to3.on4.among18：He is writing to______his appreciation of the hospitality you showed to him.1.extend2.explore3.express4.exercise19：______got home than it began to rain.1.No sooner had I2.No sooner I had3.No sooner have I4.No sooner I have20：The question______yesterday is of great importance.1.discussing2.discussed3.being discussed4.to be discussed1：Tell the taxi driver _______.1.where do you want to go2.where you want to go3.where do you want to4.you want to go2：Linda and Cheryle come from families which are______rich nor poor.1.both2.either3.neither4.as3：It seems ages since we ___ you.1.heard from2.heard about3.heard of4.heard4：I used to ____ poems when I was his age.1.write2.wrote3.writing4.written5：I spent all my spare time surfing the Internet. I am absolutely keen ___ it.1.on2.at3.in4.to6：Why does Tom want to leave the______job?1.present2.private3.public4.powerful7：The question______yesterday is of great importance.1.discussing2.discussed3.being discussed4.to be discussed8：Here is a notice______people not to litter the beach.1.warned2.warn3.warning4.having warned9：It is high time that you _____ English and computer well.1.shall learn2.should learn3.learn4.learned10：We wish that people everywhere ____ more concern for the environment around them.1.show2.showed3.shall show4.shown11：The children were______to see the performance.1.keen2.anxious3.eager4.sharp12：While_______in the factory, the students learnt a lot from theworkers.1.working2.worked3.is working4.having worked13：______, parents must set a good example for their children.1.Generally2.Obviously3.Fortunately4.Unnecessarily14：Let’s______ and see if we can find something particular.1.look at2.look up3.look for4.look around15：They were playing in the garden______they heard a scream.1.what2.when3.where4.so that16：Luckily I was weari ng a seat belt. If I hadn’t been wearing one, I ____ seriously.1.would be injured2.will have been injured3.will be injured4.would have been injured17：Things turned ____ to be exactly as the professor had foreseen1.up2.off3.down4.out18：Mr. Black is looking forward to______his Chinese partner soon.1.seeing2.see3.be seeing4.have seen19：He said ______.1.how the garden was beautiful2.how beautiful the garden was3.how beautiful was the garden4.the garden was how beautiful20：She wanted to know ___.1.what is his job2.what was his job3.what his job is4.what his job was1：He told me that I______be present at the ceremony.1.could2.should3.would4.might2：______you like to know something about Chinese acrobatics?1.Could2.Would3.Can4.Will3：The old couple ____ live next to us have four grandchildren.1.who2.which3.whom4.whose4：While_______in the factory, the students learnt a lot from the workers.1.working2.worked3.is working4.having worked5：The police do not allow him to go out of the city without ____.1.permit2.permission3.admit4.admission6：Her doctor insists that she ______ any longer.1.does not smoke2.will not smoke3.should not smoke4.has not smoked7：The book is______more difficult than the one I recommended to you.1.rather2.much3.very4.so8：The garden of his house has a lawn, ___ is very pleasant to sit on in summer.1.where2.when3.which4.that9：Modern business and industry demand that every manager ___ much about economic management.1.know2.knew3.shall know4.known10：This coat______ me one hundred and sixty yuan.1.spend2.cost3.take4.pay11：The audience, most of ____ were students, enjoyed the performance very much.1.whom2.who3.which4.that12：Luckily I was wearing a seat belt. If I hadn’t been wearing one, I ____ seriously.1.would be injured2.will have been injured3.will be injured4.would have been injured13：The father was pleased to hear the child______that.1.to say2.to have said3.said4.say14：You will be full of confidence during the interview______you are well prepared.1.unless2.if3.since4.as long as15：The children were______to see the performance.1.keen2.anxious3.eager4.sharp16：_____ it is the inviter who pays the bill.1.In many instances2.In much instance3.For many instances4.For much instance17：He talked cheerfully about the film and the actress ___ interested him.1.who2.which3.that4.what18：He talked as if he______everything.1.knows2.knew3.have known4.had known19：______got home than it began to rain.1.No sooner had I2.No sooner I had3.No sooner have I4.No sooner I have20：She wanted to know ___.1.what is his job2.what was his job3.what his job is4.what his job was20：?Li Ming takes an active part in social work.1.So does each of us2.So each of us does3.So is each of us4.So has each of us窗体底端1：The old couple ____ live next to us have four grandchildren.1.who2.which3.whom4.whose2：The meeting must be important because the CEO says no one is allowed to be ______1.present2.appear3.absent4.attend3：Things turned ____ to be exactly as the professor had foreseen1.up2.off3.down4.out4：He is writing to______his appreciation of the hospitality you showed to him.1.extend2.explore3.express4.exercise5：I want to______the position advertised by ABC Company.1.apply in2.apply on3.apply4.apply for6：I would rather that Mr. Mike ____ the speech at the conference instead of the dean that day.1.make2.made3.has made4.had made7：______you like to know something about Chinese acrobatics?1.Could2.Would3.Can4.Will8：The father was pleased to hear the child______that.1.to say2.to have said3.said4.say9：When not on stage, he spends time______at home.1.relaxing2.relax3.relaxed4.to relax10：He asked ____.1.which chair should he take2.which chair he should take3.which chair he take4.which chair he took11：?Li Ming takes an active part in social work.1.So does each of us2.So each of us does3.So is each of us4.So has each of us12：This coat______ me one hundred and sixty yuan.1.spend2.cost3.take4.pay13：The criminal didn’t realize the value of freedom______he had lost it.1.if2.as3.while4.until14：It is advisable that she ____ for Madrid as soon as possible.1.leave2.left3.has left4.shall leave15：The child ____ parents died in the air crash is living with his aunt now.1.who2.whose3.whom4.which16：In the armchair______,reading a novel.1.his mother sat2.did his mother sit3.does his mother sit4.sat his mother17：Why does Tom want to leave the______job?1.present2.private3.public4.powerful18：He talked as if he______everything.1.knows2.knew3.have known4.had known19：They were playing in the garden______they heard a scream.1.what2.when3.where4.so that20：The invitation ___ to be something you’d hate to do.1.turns in2.turns on3.turns off4.turns out1.know2.knew3.shall know4.known1.serious2.silent3.simple4.slight1.turns in2.turns on3.turns off4.turns out1.rather2.much3.very4.so1.would be injured2.will have been injured3.will be injured4.would have been injured1.write2.wrote3.writing4.written1.even if2.so that3.in case4.as if1.on which2.on that3.in which4.on whom1.whom2.who3.which4.that1.which2.when3.that4.as1.how the garden was beautiful2.how beautiful the garden was3.how beautiful was the garden4.the garden was how beautiful1.why2.because3.so4.that1.make2.made3.has made4.had made1.apply in2.apply on3.apply4.apply for1.make2.to make3.making4.made1.present2.private3.public4.powerful1.both2.either3.neither4.as1.with2.of3.for4.to1.discussing2.discussed3.being discussed4.to be discussedmit2.conform3.admit4.adapt1.know2.knew3.shall know4.known2：The doctor came out of the patient’s room with a______look on his face.1.serious2.silent3.simple4.slight3：The invitation ___ to be something you’d hate to do.1.turns in2.turns on3.turns off4.turns out4：The book is______more difficult than the one I recommended to you.1.rather2.much3.very4.so5：Luckily I was wearing a seat belt. If I hadn’t been wearing one, I ____ seriously.1.would be injured2.will have been injured3.will be injured4.would have been injured6：I used to ____ poems when I was his age.1.write2.wrote3.writing4.written7：We moved to London______we could visit our friends more often.1.even if2.so that3.in case4.as if8：That is the player _____ we all rely.1.on which2.on that3.in which4.on whom9：The audience, most of ____ were students, enjoyed the performance very much.1.whom2.who3.which4.that10：It was in that small village______our president was born.1.which2.when3.that4.as11：He said ______.1.how the garden was beautiful2.how beautiful the garden was3.how beautiful was the garden4.the garden was how beautiful12：There are two reasons ____ I do not want to go out tonight.1.why2.because3.so4.that13：I would rather that Mr. Mike ____ the speech at the conference instead of the dean that day.1.make2.made3.has made4.had made15：You’d better______the buffet supper sumptuous.1.make2.to make3.making4.made16：Why does Tom want to leave the______job?1.present2.private3.public4.powerful17：Linda and Cheryle come from families which are______rich nor poor.1.both2.either3.neither4.as18：The Greeks believed that individuals must beresponsible______their own actions.1.with2.of3.for4.to19：The question______yesterday is of great importance.1.discussing2.discussed3.being discussed4.to be discussed20：If you want to be an actor you have to really _____ yourself to it.mit2.conform3.admit4.adapt11：ABC Company______a person for full-time sales in the clothing department.1.inquire2.require3.ask4.charge1：______by these success, they decided to expand the business.1.Encouraging2.Encouraged3.Having encouraged4.Being encouraging9：He asks ___3_ .1.when will they leave2.when they leave3.when they will leave4.they when will leave19：In the armchair______,reading a novel.1.his mother sat2.did his mother sit3.does his mother sit4.sat his mother。
北理大学英语2
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He is going to visit the college _____ he studied 30 years ago.
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本次作业总分值:100.0得分:60.0正确的题数：6题目总数：10正确率:60.000004%
After Jackson ______ for an hour, he came to the conclusion that Mrs. Bonnie was not coming.
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I hope you______ the instructions ready before I come tomorrow.
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All the apparatus______ before the experiment began.
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Three people, ______, were injured in the accident.
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We've already sent out the invitation cards, but we don't know how many people_________.
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本次作业总分值:100.0得分:70.0正确的题数：7题目总数：10正确率:70.0%
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We can do nothing unless we _____ more information.
北理工20秋《大学英语(2)》在线作业52401
(单选题)1: ______ you eat the correct foods ______ be able to keep fit and stay healthy.A: Only if; will youB: Only if; you willC: Unless; will youD: Unless;you will正确答案: A(单选题)2: You should have been more patient ______ that customer；I'm sure that selling him the watch was a possibility.A: ofB: withC: forD: at正确答案: B(单选题)3: The various measures the government has taken are meant to _________ the world trade.A: produceB: proceedC: promoteD: remote正确答案: C(单选题)4: ______ he worked very ha rd all day, he couldn’t finish the job in time. A: AlthoughB: EvenC: In spiteD: In case正确答案: A(单选题)5: I have got some leave ____________ to me at the end of the month and I will have a good rest.A: comingB: belongingC: owingD: due正确答案: D(单选题)6: Ted was so worn out that he just _____ down and slept for ten hours. A: liedB: laidC: layD: had lain(单选题)7: He rushed back home, _____________ find the house burnt down to ground. A: in order toB: as a result toC: and was able toD: only to正确答案: D(单选题)8: Mistakes, if they lead to greater self knowledge, are _____________. A: no bad thingB: not bad thingsC: no any bad thingsD: in no way bad thing正确答案: A(单选题)9: It was ____________ to suppose that George could ever get here on time. A: mistakenB: falseC: a failureD: a mistake正确答案: D(单选题)10: It ________ we had stayed together for a couple of weeks _______ I found we had a lot in common.A: was until; whenB: was until; thatC: wasn’t until; whenD: wasn’t until; that正确答案: D(单选题)11: Your hard work over the years for the company _____________.A: is worth of a creditB: gives him creditC: does you creditD: has lots of credit to you正确答案: C(单选题)12: The school is ____________ to the university as a teaching research centre.A: connectedB: joinedC: unitedD: attached(单选题)13: They have decided to ____________ another telephone line in their house. A: fit upB: fit inC: fitD: install正确答案: D(单选题)14: There is a nice-looking car there. I wonder ______.A: whom it belongs toB: whom does it belong toC: it belongs to whomD: whom does it belong正确答案: A(单选题)15: _____ is one of good properties of this metal.A: Light in weightB: Having been light in weightC: Be light in weightD: Being light in weight正确答案: D(单选题)16: It’s important to get prepared for a/an _____________ for a new job. A: interviewB: meetingC: dateD: discussion正确答案: A(单选题)17: The new bus stop is _____________ easy for people to get to.A: deadB: deadlyC: muchD: complete正确答案: B(单选题)18: Sorry, I don’t know he is a friend of _____.A: your brotherB: your brothersC: your brother’s friendD: your brother’s正确答案: D(单选题)19: The moon is a world that is completely still and _____ utter silence prevails.A: thatB: whereC: whichD: whenever正确答案: B(单选题)20: He suggested ______ a lecture given by Professor White on English language learning.A: me to attendB: my attendingC: my attentionD: me attending正确答案: B(单选题)21: No one can be sure if the car on display fits him or her until he or she _____ them.A: triesB: will tryC: are tryingD: have tried正确答案: A(单选题)22: The size of the audience, ______ we had expected was well over one thousand.A: whomB: whoC: asD: that正确答案: C(单选题)23: It's a/an _____________ to waste your money on such a film.A: crimeB: offenceC: wrongD: illness正确答案: A(单选题)24: I don’t think you’ve heard of him before, ______?A: don’t IB: do IC: have youD: haven’t you正确答案: C(单选题)25: When he arrived, he found _______ the aged and the sick at home.A: none butB: none other thanC: nothing butD: no other than正确答案: A(单选题)26: We'll leave as soon as it________ raining.A: is stoppingB: stopsC: will stopD: shall stop正确答案: B(单选题)27: There are many kinds of metals, ______.A: each having its special propertiesB: having its special propertiesC: one has its special propertiesD: each has its special properties正确答案: A(单选题)28: The English students should be encouraged to ____________ more practical approaches.A: pickB: receiveC: fetchD: adopt正确答案: D(单选题)29: The teacher, as well as all his students, _____ by the dancer’s performance.A: was impressedB: had impressedC: impressedD: be impressed正确答案: A(单选题)30: The United States tried to __________ the badly damaged relationship between the two countries.A: fixB: mendC: correctD: revise正确答案: B(单选题)31: We've already sent out the invitation cards, but we don't know how many people_________.A: comeB: are comingC: cameD: have come正确答案: B(单选题)32: The football match _____ in the afternoon.A: has been heldB: is being heldC: is going to be heldD: will hold正确答案: C(单选题)33: ________ all your children will leave home to lead their own lives as adults.A: EventuallyB: FinallyC: At lastD: At the end正确答案: A(单选题)34: With tears on her face, the old lady watched the little boy _____ to a hospital.A: sendB: to do sentC: being sentD: sending正确答案: C(单选题)35: Having worked for three hours or so they stopped ____ a rest.A: takingB: to takeC: havingD: having take正确答案: B(单选题)36: He remembered ______ to the zoo by his father when he was little. A: being takenB: takingC: have been takenD: to have taken正确答案: A(单选题)37: We love peace, yet we are not the kind of people to yield ______ any military threat.A: upB: toC: inD: at正确答案: B(单选题)38: We all feel sorry for _____ for so long after your arrival.A: keep you waitingB: having kept you waitingC: waiting for youD: keep you wait正确答案: B(单选题)39: I will give you my friend’s home address, ________ I can be reached most evenings.A: whichB: whenC: whomD: where正确答案: D(单选题)40: The girl _____ house he visited was Sherry.A: of whichB: of whomC: whichD: whose正确答案: D(单选题)41: I have taken many photos. I’m going to get the film ______.A: being developedB: developingC: developedD: to be developed正确答案: C(单选题)42: Had the weather been good, the children _____ out for a walk.A: had goneB: could have goneC: would goD: went正确答案: B(单选题)43: It is requested that every student _______ a paper on sustainable development.A: writesB: wroteC: writingD: write正确答案: D(单选题)44: She did not even look up when I took my seat ____ her.A: besideB: besidesC: exceptD: to正确答案: A(单选题)45: When I got to the top of the mountain, the sun _____.A: shoneB: shinesC: has shoneD: was shining正确答案: D(单选题)46: After Jackson ______ for an hour, he came to the conclusion that Mrs. Bonnie was not coming.A: waitedB: was waitingC: has waitedD: had been waiting正确答案: D(单选题)47: Not always _____ they want to.A: people can do whatB: people cannot do whatC: can people do whatD: can’t people do what正确答案: C(单选题)48: Most environmental problems exist because adequate measures for preventing them _____taken in the past.A: was notB: were notC: were not beingD: being not正确答案: B(单选题)49: Give a little from the heart, _____________ you receive a lot in spirit. A: thenB: andC: ifD: unless正确答案: B(单选题)50: ____ from space, the earth looks like a “blue planet”.A: SeeingB: To seeC: SeenD: Having seen正确答案: C(单选题)1: ______ you eat the correct foods ______ be able to keep fit and stay healthy.A: Only if; will youB: Only if; you willC: Unless; will youD: Unless;you will正确答案: A(单选题)2: You should have been more patient ______ that customer；I'm sure that selling him the watch was a possibility.A: ofB: withC: forD: at正确答案: B(单选题)3: The various measures the government has taken are meant to _________ the world trade.A: produceB: proceedC: promoteD: remote正确答案: C(单选题)4: ______ he worked very hard all day, he couldn’t finish the job in time. A: AlthoughB: EvenC: In spiteD: In case正确答案: A(单选题)5: I have got some leave ____________ to me at the end of the month and I will have a good rest.A: comingB: belongingC: owingD: due正确答案: D(单选题)6: Ted was so worn out that he just _____ down and slept for ten hours. A: liedB: laidC: layD: had lain正确答案: C(单选题)7: He rushed back home, _____________ find the house burnt down to ground. A: in order toB: as a result toC: and was able toD: only to正确答案: D(单选题)8: Mistakes, if they lead to greater self knowledge, are _____________. A: no bad thingB: not bad thingsC: no any bad thingsD: in no way bad thing正确答案: A(单选题)9: It was ____________ to suppose that George could ever get here on time. A: mistakenB: falseC: a failureD: a mistake正确答案: D(单选题)10: It ________ we had stayed together for a couple of weeks _______ I found we had a lot in common.A: was until; whenB: was until; thatC: wasn’t until; whenD: wasn’t until; that正确答案: D(单选题)11: Your hard work over the years for the company _____________.A: is worth of a creditB: gives him creditC: does you creditD: has lots of credit to you正确答案: C(单选题)12: The school is ____________ to the university as a teaching research centre.A: connectedB: joinedC: unitedD: attached正确答案: D(单选题)13: They have decided to ____________ another telephone line in their house. A: fit upB: fit inC: fitD: install正确答案: D(单选题)14: There is a nice-looking car there. I wonder ______.A: whom it belongs toB: whom does it belong toC: it belongs to whomD: whom does it belong正确答案: A(单选题)15: _____ is one of good properties of this metal.A: Light in weightB: Having been light in weightC: Be light in weightD: Being light in weight正确答案: D(单选题)16: It’s important to get prepared for a/an _____________ for a new job. A: interviewB: meetingD: discussion正确答案: A(单选题)17: The new bus stop is _____________ easy for people to get to.A: deadB: deadlyC: muchD: complete正确答案: B(单选题)18: Sorry, I don’t know he is a friend of _____.A: your brotherB: your brothersC: your brother’s friendD: your brother’s正确答案: D(单选题)19: The moon is a world that is completely still and _____ utter silence prevails.A: thatB: whereC: whichD: whenever正确答案: B(单选题)20: He suggested ______ a lecture given by Professor White on English language learning.A: me to attendB: my attendingC: my attentionD: me attending正确答案: B(单选题)21: No one can be sure if the car on display fits him or her until he or she _____ them.A: triesB: will tryC: are tryingD: have tried正确答案: A(单选题)22: The size of the audience, ______ we had expected was well over one thousand.B: whoC: asD: that正确答案: C(单选题)23: It's a/an _____________ to waste your money on such a film.A: crimeB: offenceC: wrongD: illness正确答案: A(单选题)24: I don’t think you’ve heard of him before, ______?A: don’t IB: do IC: have youD: haven’t you正确答案: C(单选题)25: When he arrived, he found _______ the aged and the sick at home.A: none butB: none other thanC: nothing butD: no other than正确答案: A(单选题)26: We'll leave as soon as it________ raining.A: is stoppingB: stopsC: will stopD: shall stop正确答案: B(单选题)27: There are many kinds of metals, ______.A: each having its special propertiesB: having its special propertiesC: one has its special propertiesD: each has its special properties正确答案: A(单选题)28: The English students should be encouraged to ____________ more practical approaches.A: pickB: receiveC: fetchD: adopt正确答案: D(单选题)29: The teacher, as well as all his students, _____ by the dancer’s performance.A: was impressedB: had impressedC: impressedD: be impressed正确答案: A(单选题)30: The United States tried to __________ the badly damaged relationship between the two countries.A: fixB: mendC: correctD: revise正确答案: B(单选题)31: We've already sent out the invitation cards, but we don't know how many people_________.A: comeB: are comingC: cameD: have come正确答案: B(单选题)32: The football match _____ in the afternoon.A: has been heldB: is being heldC: is going to be heldD: will hold正确答案: C(单选题)33: ________ all your children will leave home to lead their own lives as adults.A: EventuallyB: FinallyC: At lastD: At the end正确答案: A(单选题)34: With tears on her face, the old lady watched the little boy _____ to a hospital.A: sendB: to do sentC: being sentD: sending正确答案: C(单选题)35: Having worked for three hours or so they stopped ____ a rest.A: takingB: to takeC: havingD: having take正确答案: B(单选题)36: He remembered ______ to the zoo by his father when he was little. A: being takenB: takingC: have been takenD: to have taken正确答案: A(单选题)37: We love peace, yet we are not the kind of people to yield ______ any military threat.A: upB: toC: inD: at正确答案: B(单选题)38: We all feel sorry for _____ for so long after your arrival.A: keep you waitingB: having kept you waitingC: waiting for youD: keep you wait正确答案: B(单选题)39: I will give you my friend’s home address, ________ I can be reached most evenings.A: whichB: whenC: whomD: where正确答案: D(单选题)40: The girl _____ house he visited was Sherry.A: of whichB: of whomC: whichD: whose正确答案: D(单选题)41: I have taken many photos. I’m going to get the film ______.A: being developedB: developingC: developedD: to be developed正确答案: C(单选题)42: Had the weather been good, the children _____ out for a walk.A: had goneB: could have goneC: would goD: went正确答案: B(单选题)43: It is requested that every student _______ a paper on sustainable development.A: writesB: wroteC: writingD: write正确答案: D(单选题)44: She did not even look up when I took my seat ____ her.A: besideB: besidesC: exceptD: to正确答案: A(单选题)45: When I got to the top of the mountain, the sun _____.A: shoneB: shinesC: has shoneD: was shining正确答案: D(单选题)46: After Jackson ______ for an hour, he came to the conclusion that Mrs. Bonnie was not coming.A: waitedB: was waitingC: has waitedD: had been waiting正确答案: D(单选题)47: Not always _____ they want to.A: people can do whatB: people cannot do whatC: can people do whatD: can’t people do what正确答案: C(单选题)48: Most environmental problems exist because adequate measures for preventing them _____taken in the past.A: was notB: were notC: were not beingD: being not正确答案: B(单选题)49: Give a little from the heart, _____________ you receive a lot in spirit. A: thenB: andC: ifD: unless正确答案: B(单选题)50: ____ from space, the earth looks like a “blue planet”.A: SeeingB: To seeC: SeenD: Having seen正确答案: C。
北理工《大学英语》在线试题及答案.doc
1. Prices are _________ at an ever-increasing speed; people are complaining loudly.A. goingB. advancingC. progressingD. moving2. The actor went to the United States many years ago. He has been ___________ forgotten.A. above allB. after allC. all butD. all out3. I didn’t go to the party, but I do wish I ______ there.A. wereB. would beC. had beenD. will be4. The moon is a world that is completely still and _____ utter silence prevails.A. thatB. whereC. whichD. whenever5. Ted was so worn out that he just _____ down and slept for ten hours.A. liedB. laidC. layD. had lain6. We've already sent out the invitation cards, but we don't know how many people_________.A. comeB. are comingC. cameD. have come7. It’s important to get prepared for a/an _____________ for a new job.A. interviewB. meetingC. dateD. discussion满分：2 分8. It's a/an _____________ to waste your money on such a film.A. crimeB. offenceC. wrongD. illness满分：2 分9. While they were having afternoon tea, he was invited to ___________ for dinner.A. stayB. remainC. sitD. keep满分：2 分10. No one can be sure if the car on display fits him or her until he or she _____ them.A. triesB. will tryC. are tryingD. have tried满分：2 分11. After Jackson ______ for an hour, he came to the conclusion that Mrs. Bonnie was not coming.A. waitedB. was waitingC. has waitedD. had been waiting满分：2 分12. All the apparatus______ before the experiment began.A. have been testedB. had been testedC. were testedD. had tested满分：2 分13. Something must have happened on their way here, or they _____ by now.A. should have arrivedB. should arriveC. would have arrivedD. would arrive满分：2 分14. It’s up to the young man himself to _____________ a career.A. electB. chooseC. pickD. get满分：2 分15. The football match _____ in the afternoon.A. has been heldB. is being heldC. is going to be heldD. will hold满分：2 分16. We do not _____________ that the past years have been without problems for us.A. attendB. pretendC. intendD. extend满分：2 分17. He is going to visit the college _____ he studied 10 years ago.A. whereB. thatC. in whereD. which满分：2 分18. Do what you think is right _____ they say.A. howeverB. whateverC. whicheverD. if only满分：2 分19. Teachers should make decisions ___________ whether the students need more help.A. as forB. as toC. as far asD. in relation to满分：2 分20. The fisherman, _____ poor, could not buy another boat.A. isB. wasC. beingD. been满分：2 分21. The school is ____________ to the university as a teaching research centre.A. connectedB. joinedC. unitedD. attached满分：2 分22. Not always _____ they want to.A. people can do whatB. people cannot do whatC. can people do whatD. can’t people do what满分：2 分23. I’ll take down your name and address in case you _____ as a witness.A. will needB. will be neededC. needD. are needed满分：2 分24. I have got some leave ____________ to me at the end of the month and I will have a good rest.A. comingB. belongingC. owingD. due满分：2 分25. The size of the audience, ______ we had expected was well over one thousand.A. whomB. whoC. asD. that满分：2 分26. Peter wishes that he _____ law instead of literature when he was in college.A. could studyB. studiedC. had studiedD. would study满分：2 分27. Every means ______ been tried ever since the machine broke down.A. hasB. haveC. areD. is满分：2 分28. There is a nice-looking car there. I wonder ______.。
北京理工大学网络教育期末考试大学英语二 3
大学英语二-2005-0003 (题目数量：29 总分：100.0)1.单选题(题目数量：20 总分：40.0)1. She’s been reported missing and we’re checking her movements for the two weeks before she ## .A.vanishedB.survivedC.observedD.revealed答案:A2. —Tom told me that you collect stamps. —##.A.at do you mean?B.I don't think so.C.Why did he tell you?D.Yes, I do. Do you?答案:D3. “Is there anything in your personal life which would ## the party if it became public?”A.embarrassB.disturbC.wakenD.involve答案:A4. They provide information on methods to improve the ## training programs for older workers, including helping older workers to find productive employment.A.formationB.efficiencyC.selectionD.dignity答案:B5. If you don’t read, then ## you will forget how to read.A.mysteriouslyB.unfortunatelyC.positivelyD.eventually答案:D6. —Could you tell me where the nearest parking lot is? —##A.Don't ask me.B.Parking is very difficult.C.Sorry, I'm a stranger here.D.Sorry, you can't park here答案: C7. Burns can be caused when skin that isn’t used to the sun is ## to short bursts of strong sunlight.A.exposedB.snappedC.wrinkledD.revealed答案:A8. —David injured his leg playing football yesterday. —Really? ##?A.Who did thatB.What’s wrong with himC.How did that happenD.Why was he so careless答案:C9. He could see her lips ## and hoped she would not cry in public again.A.disturbingB.tremblingC.shakingD.stooping答案:B10. —Is it OK if I take this seat? —Sorry, ##.A.here you areB.take itC.it’s takenD.never mind答案:C11. Early in the morning, I was ## out of bed to repair a minor fault on the car.A.distractedB.draggedC.wakenedD.assigned答案:B12. A sob caught his throat and he coughed to ## it.A.prohibitB.maskC.emitD.crash答案:B13. —Bring me the bill, please. —##.A.You are welcomeB.Please wait for a moment, sirC.I'll hurry upD.Be quick答案:B14. As anyone who has ## an accident will tell you, the apparent security of cars is deceptive.A.sampledB.survivedC.vanishedD.Scraped答案:B15. Drinking a cup of hot water should help to ## the pain in the short term, but, if it persists, you should see a doctor as soon as possible.A.fortifyB.shiftC.wrapD.relieve答案:D16. “We have monitored in the area and there is no ## to health,”she said.A.suggestionB.hazardplimentD.recipe答案:B17. —Thanks for the lovely party and the delicious food. —##.A.No, thanks.B.Never mind.C.Thank you for coming.D.That's all right.答案:C18. —Hey, Linda. You look so pale. What's the matter? —##?A.Thank you.B.Are you OK?C.I'm just getting over the flu.D.I'm feeling well.答案:C19. —Are you going on holiday for a long time? —##.A.It was a long timeB.Two weeks agoC.No, only a couple of daysD.Not long time ago答案:C20. We had decided that our last day would be spent ## one of the many activities which the hotel offered to arrange.A.consolidatingB.samplingC.proceedingD.selecting答案:B2.阅读理解(题目数量：1 总分：15.0)1. A study suggests that dirty air can reduce lung development. Researchers at the University of Southern California in Los Angeles published their work in the New England Journal of Medicine.About one thousand seven hundred children from different communities in Southern California took part in the study. The scientists tested the children every year for eight years, starting at age ten. They say this is the longest study ever done on air pollution and the health of children.The scientists found that children who lived in areas with the dirtiest air were five times more likely to grow up with weak lungs. Many were using less than eighty percent of normal lung strength to breathe.The damage from dirty air was as bad as that found in children with parents who smoke. Children with reduced lung power may suffer more severe effects from a common cold, for example.But the researchers express greater concerns aboutlong-term effects. They say adults normally begin to lose one percent of their lung power each year after age twenty. The doctors note that weak lung activity is the second leadingcause of early deaths among adults. The first is smoking.By the time people are eighteen, their lungs are fully developed, or close to it. The doctors say it is impossible to recover from any damage.Researchers say they are still not sure how air pollution affects lung development. They believe that pollution affects the tiny air spaces where oxygen and carbon dioxide are exchanged.Arden Pope is an economics professor at Brigham Young University in Provo, Utah. Professor Pope wrote a commentary about the study. He noted that air quality in Southern California has improved since the study began in the early nineteen-nineties. Clean-air laws have reduced pollution from vehicles, industry and other causes.But dirty air is still a problem in areas of California and other places. Professor Pope says continued efforts to improve air quality are likely to provide additional improvements in health.答案:3.完型填空(题目数量：1 总分：20.0)1. While I was waiting to enter university, I saw an advertisement in a newspaper–a teaching job wanted at a school about ten miles from where I lived. Being very short of money and wanting to do something useful, I applied, fearing as I did so, that without a degree and with no of teaching my chances of getting the job were .However, three days later, a letter arrived, calling me to Croydon for a meeting with the headmaster. It was clearly the himself that open the door. He was shout and round. "The school," he said, "is made up one class of twenty-four boys between seven and thirteen.”I should have to teach all the subjects except art he taught himself. I should have to divide the class into groups and teach them in turn at three different . And I was not glad at the thought of teaching maths, a subject at which I wasn’t very at school. Worse perhaps was the idea of to teach them on Saturday afternoon because most of my friends would be enjoying themselves at that time.Before I had time to ask about my salary, he got up to his . "Now," he said, “You’d better meet my wife. She is the one who really this school.”答案:4.判断题(题目数量：5 总分：5.0)1. Jim's friends said that the noise pollution in their city was terrible, but they had to live with it. 译为：吉姆的朋友说他们那个城市的污染严重，但是他们只好住在那里。
北理工网络教育大学英语2整理版答案
《大学英语二》1、交际用语复习提示：（从以下选取15小题）：1）—Is it OK if I take this seat? —Sorry, _________ C. it’s taken2）—Can I ask you a few questions? —_________ D. Certainly.3）—Excuse me, can you tell me the way to the bus stop?—_A. Yes, go straight down this way to the end.4）—Let’s go to the library this afternoon.— ________. D That’s a good idea5）-Hi, is Mary there, please? - ________A Hold on. I’ll get her.6）—Do you think I could borrow your dictionary? —_________.D. Yes, help yourselves7）-Madam, do all the buses go downtown? - ________.D Sorry, I’m new here8）—You haven't paid for it yet. — A Oh, I'm really very sorry.9）— Bring me the bill, please. —________. B. Please wait for a moment, sir10）—Hey, Linda. You look so pale. What's the matter? —?C I'm just getting over the flu.11) —Can I have a look at your letter, please? —________. B. I’m afraid you can’t12) —You've got the first prize in the dancing contest. — ____ B Oh, really? I can't believe my ears!.13) —You've been busy, haven't you? —_B Yes, I've been working hard on my paper.14) —Paul, _ B. who’s talking over there? —Oh, that’s my father! And beside him, my mother.15) —Would you mind if I turned the radio up? —_________B No, go right ahead.16) —Sorry, I couldn’t come to the party. I was sick that day. —________.B That’s all right17) —Where is the Loan Department, please? —_________B This way, please.18) —This is a challenging job. Who wants it? — _____A I'll take it.19)Susan is absent from today’s writing class.A How come? As far as I know,she has never missed a class.20) Unbelievable! I have failed the driving test again! — . This is not the end of the world. BCheer up 21）—Could you help me put up the signs on the wall? —_____A. No problem22) —____ C. How are you getting on with your English __? —Quite well. Thank you.23) —We are going to have a singing party tonight. Would you like to join us?— ________. A I’m afraid not, because I have to go to an important meeting24)—What’s the problem with your bike? — ________. C Nothing serious25)—Would you mind if I turned the radio up? —_.B. No, go right ahead26) Are you getting a new flat this year?B. You must be joking I can’t afford to pay my bills, let alone buy a new flat.27) —Wow! This is a marvelous room! I’ve never known you’re so artistic. —_ C Thank you for your compliments28) —Could I ask you a rather personal question? —Of course, _________.D. go ahead29) —________? —He teaches physics in a school. A. What does your father do30) — Are you going on holiday for a long time? — _________. C. No, only a couple of days第一部分：交际用语—Can I ask you a few questions? —_________ D. Certainly.—Excuse me, can you tell me the way to the bus stop? —_____A. Yes, go straight down this way to the end.—Do you think I could borrow your dictionary?—_________.D. Yes, help yourselves— Bring me the bill, please. —________.B. Please wait for a moment, sir—Can I have a look at your letter, please? —________. . B. I’m afraid you can’t— Are you going on holiday for a long time? — _________. C. No, only a couple of days—Could I ask you a rather personal question? —Of course, _________.D. go ahead—Are you getting a new flat this year?—_________, I can’t afford to pay my bills, let alone buy a new flat.B. You must be joking—Doctor, I don’t feel well. —_________C. What’s the matter?—Could you help me put up the signs on the wall? —_________.A. No problem11. —I’m terribly sorry that I’ve spilled some coffee on the carpet.—________ .B. It doesn’t matter12. —Tomorrow is my birthday.— ________.C. Many happy returns of the day!13. —You speak English very good.—________.C. Thank you14. —I’m sorry to trouble you. Can I borrow a pen, please?—________.B. Certainly! It is here15. —I was born in Boston, but I studied in New York. ________?—I was born in New York, but studied in Boston. B. And you第二部分：阅读理解A: Concerning money or anything else, conflicts between husband and ^……16. According to the writer, conflicts between husband and wife usually reflect ______.B. power struggle17. As children enter adolescents, they begin to do the following except ______.C. getting married whenever they please18. ".Generation gap is narrowing "means _C. the vast majority of teenagers share most of their parents' values and ideas19. Parents and children often disagree about what is important or right because ______.D. they are in a society of rapidly changing social and moral values20. When many American parents don't know how to deal with their children they seek advice from the following except ______. A. neighborsB:What do we mean by a satisfactory standard of living? Obviously, ……21. What we need in life is divided into ______ according to this article A. the basic necessities and luxury22. A person who gets the basic necessities must ____ according to the writer. A. have a reliable income23. We all enjoy ____________.B. having reliable income and extra income24. With time going on, ______.A. a luxury may change into a need which most people want to get25. If most people of a country have a television, we _______.C. can not say the television is the basic necessities第三部分：词汇与结构26. At 6:30 a.m. next morning the train Central Station, Glasgow. A. pulled into27. A sob caught his throat and he coughed to it. B. mask28. She’s been reported missing and we’re checking her movements for the two weeks before she A. vanished29. In a small enterprise or department, management by inertia (惰性) is a disease.B. deadly30. Mr. Trump would not details of his plan for a new factory to make mobile phones in China.B. reveal31. But it is D. evident that publishers, to stay in business, need to bring out a large number of titles every year.32. “We have monitored in the area and there is no to health,” she said.B. hazard33. He could see her lips and hoped she would not cry in public again. B. trembling34. The result of every accident, however , is a rise in the cost of insurance(保险).D. minor35. The only way to a fear is to face it, and to do so as frequently as possible.D. conquer第四部分：完形填空（共10小题；每小题2分，满分20分）36--40. BDBAC 41--45. CDBBAWhile I was waiting to enter university, I saw an advertisement in a newspaper–a teaching job wanted at a school about ten miles from where I lived. Being very short of money and wanting to do something useful, I applied, fearing as I did so, that without a degree and with no 36 of teaching my chances of getting the job were 37 .However, three days later, a letter arrived, calling me to Croydon for a meeting with the headmaster. It was clearly the 38 himself that open the door. He was shout and round."The school," he said, "is made up one class of twenty-four boys between se ven and thirteen.” I should have to teach all the subjects except art, 39 he taught himself. I should have to divide the class into 40 groups and teach them in turn at three different 41 . And I was not glad at the thought of teaching maths, a s ubject at which I wasn’t very 42 at school. Worse perhaps was the idea of 43 to teach them on Saturday afternoon because most of my friends would be enjoying themselves at that time.Before I had time to ask about my salary, he got up to his 44 . "Now," he said, “You’d better meet my wife. She is the one who really 45 this school.”36. A. material B. experience C. means D. books37. A. nice B. great C. helpful D. slight38. A. teacher B. headmaster C. student D. door-keeper39. A. which B. that C. what D. this40. A. one B. two C. three D. four41. A. classes B. subjects C. levels D. places42. A. poor B. interested C. week D. good43. A. forcing B. having C. forgetting D. managing44. A. letter B. feet C. hands D. wife45. A. runs B. starts C. observes D. likes《大学英语2 》期末试卷（A卷）答题纸第五部分：英译汉（共5小题；每小题2分，满分10分）请在20分钟内把下列5句英文翻译成中文，并在本页上端填写考生信息。
北理工《大学英语(2)》在线作业-000320
答案：A
They have decided to ____________ another telephone line in their house.
A:fit up
B:fit in
C:fit
D:install
答案：D
Peter wishes that he _____ law instead of literature when he was in college.
A:come
B:are coming
C:came
D:have come
答案：B
Mistakes, if they lead to greater self knowledge, are _____________.
A:no bad thing
B:not bad things
C:no any bad things
I suddenly _____ an insect crawling up my leg.
A:felt
B:was feeling
C:was felt
D:was being felt
答案：A
The actor went to the United States many years ago. He has been ___________ forgotten.
A:each having its special properties
B:having its special properties
C:one has its special properties
答案：A
We love peace, yet we are not the kind of people to yield ______ any military threat.
北理工20春《大学英语(2)》在线作业答案
B: are coming
C: came
D: have come
正确答案: B
(单选题)7: The school is ____________ to the university as a teaching research centre.
A: connected
B: joined
A: in duty
B: in charge
C: in place
D: in power
正确答案: B
D: whom does it belong
正确答案: A
(单选题)15: There are many kinds of metals, ______.
A: each having its special properties
B: having its special properties
C: one has its special properties
C: having
D: having take
正确答案: B
(单选题)4: They have decided to ____________ another telephone line in their house.
A: fit up
fit in
C: fit
D: install
正确答案: D
正确答案: C
(单选题)17: I have taken many photos. I’m going to get the film ______.
A: being developed
B: developing
C: developed
D: to be developed
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北理工《大学英语（2）》在线作业试卷总分:100 得分:100一、单选题1.There is a nice-looking car there. I wonder ______.A. whom it belongs toB. whom does it belong toC. it belongs to whomD. whom does it belong正确答案:A2. She did not even look up when I took my seat ____ her.A. besideB. besidesC. exceptD. to正确答案:A3.The actor went to the United States many years ago. He has been ___________ forgotten.A. above allB. after allC. all butD. all out正确答案:C4.Do what you think is right _____ they say.A. howeverB. whateverC. whicheverD. if only正确答案:B5. Having worked for three hours or so they stopped ____ a rest.A. takingB. to takeC. havingD. having take正确答案:B6. We'll leave as soon as it________ raining.A. is stoppingB. stopsC. will stopD. shall stop满分：2 分正确答案:B7. There are many kinds of metals, ______.A. each having its special propertiesB. having its special propertiesC. one has its special propertiesD. each has its special properties满分：2 分正确答案:A8. Henry talks to his dog as if it ______ him.A. understoodB. understandC. understandsD. would understand满分：2 分正确答案:A9. I have got some leave ____________ to me at the end of the month and I will havea good rest.A. comingB. belongingC. owingD. due满分：2 分正确答案:D10. Give a little from the heart, _____________ you receive a lot in spirit.A. thenB. andC. ifD. unless满分：2 分正确答案:B11. Our society has changed and ______ in it.A. so the people haveB. the people have soC. so have the peopleD. have the people so满分：2 分正确答案:C12. Those _____ are selected come to register, please.A. heB. theyC. whoD. whom满分：2 分正确答案:C13. Every means ______ been tried ever since the machine broke down.A. hasB. haveC. areD. is满分：2 分正确答案:A14. All the apparatus______ before the experiment began.A. have been testedB. had been testedC. were testedD. had tested满分：2 分正确答案:A15. Peter wishes that he _____ law instead of literature when he was in college.A. could studyB. studiedC. had studiedD. would study满分：2 分正确答案:C16. He is going to visit the college _____ he studied 10 years ago.A. whereB. thatC. in whereD. which满分：2 分正确答案:A17. The teacher, as well as all his students, _____ by the dancer’s performance.A. was impressedB. had impressedC. impressedD. be impressed满分：2 分正确答案:A18. She lied to me because she _____ in order not to make me sad.A. mustB. shouldC. had toD. needed满分：2 分正确答案:C19. Your hard work over the years for the company _____________.A. is worth of a creditB. gives him creditC. does you creditD. has lots of credit to you满分：2 分正确答案:C20. Mistakes, if they lead to greater self knowledge, are _____________.A. no bad thingB. not bad thingsC. no any bad thingsD. in no way bad thing满分：2 分正确答案:A21. The various measures the government has taken are meant to _________ the world trade.A. produceB. proceedC. promoteD. remote满分：2 分正确答案:C22. The _________ doctor has at last been caught, after having cheated so many people.A. fakeB. falseC. make-believeD. pretending满分：2 分正确答案:A23. When evening came, the roads were completely ____________ of traffic.A. emptyB. desertedC. filledD. clear满分：2 分正确答案:A24. They have decided to ____________ another telephone line in their house.A. fit upB. fit inC. fitD. install满分：2 分正确答案:D25. He rushed back home, _____________ find the house burnt down to ground.A. in order toB. as a result toC. and was able toD. only to满分：2 分正确答案:D26. The United States tried to __________ the badly damaged relationship between the two countries.A. fixB. mendC. correctD. revise满分：2 分正确答案:B27. The man in the corner confessed to _______ a lie to the manager of the company.A. have toldB. be toldC. being toldD. having told满分：2 分正确答案:D28. The English students should be encouraged to ____________ more practical approaches.A. pickB. receiveC. fetchD. adopt满分：2 分正确答案:D29. We love peace, yet we are not the kind of people to yield ______ any military threat.A. upB. toC. inD. at满分：2 分正确答案:B30. The girl _____ house he visited was Sherry.A. of whichB. of whomC. whichD. whose满分：2 分正确答案:D31. Ted was so worn out that he just _____ down and slept for ten hours.A. liedB. laidC. layD. had lain满分：2 分正确答案:C32. I am too busy these days. I would rather all of you ______ next month for a dinner.A. comeB. would comeC. cameD. have come满分：2 分正确答案:C33. He suggested ______ a lecture given by Professor White on English language learning.A. me to attendB. my attendingC. my attentionD. me attending满分：2 分正确答案:B34. ______ he worked very hard all day, he couldn’t finish the job in time.A. AlthoughB. EvenC. In spiteD. In case满分：2 分正确答案:A35. Her suggestion that everybody _____ was not appreciate.A. sing a songB. sang a songC. sung a songD. singing a song满分：2 分正确答案:A36. It was ____________ to suppose that George could ever get here on time.A. mistakenB. falseC. a failureD. a mistake满分：2 分正确答案:D37. “This is a terribly heavy box.”“_____help you to carry it.”A. I am toB. I willC. ID. I am going to满分：2 分正确答案:B38. I don’t think you’ve heard of him before, ______?A. don’t IB. do IC. have youD. haven’t you满分：2 分正确答案:C39. We all feel sorry for _____ for so long after your arrival.A. keep you waitingB. having kept you waitingC. waiting for youD. keep you wait满分：2 分正确答案:B40. Had the weather been good, the children _____ out for a walk.A. had goneB. could have goneC. would goD. went满分：2 分正确答案:B41. The size of the audience, ______ we had expected was well over one thousand.A. whomB. whoC. asD. that满分：2 分正确答案:C42. Myra would not forget her mother's birthday, ____ she was very busy.A. even ifB. on ifC. if onlyD. if满分：2 分正确答案:A43. The football match _____ in the afternoon.A. has been heldB. is being heldC. is going to be heldD. will hold满分：2 分正确答案:C44. It’s important to get prepared for a/an _____________ for a new job.A. interviewB. meetingC. dateD. discussion满分：2 分正确答案:A45. You should have been more patient ______ that customer；I'm sure that selling him the watch was a possibility.A. ofB. withC. forD. at满分：2 分正确答案:B46. I will give you my friend’s home address, ________ I can be reached most evenings.A. whichB. whenC. whomD. where满分：2 分正确答案:D47. When he arrived, he found _______ the aged and the sick at home.A. none butB. none other thanC. nothing butD. no other than满分：2 分正确答案:A48. I was _____ at the stop as long as thirty minutes.A. made waitingB. kept waitingC. keeping waitedD. kept waited满分：2 分正确答案:B49. The manager has his employees_____ a business report every week.A. to writeB. writtenC. writingD. write满分：2 分正确答案:D50. Most environmental problems exist because adequate measures for preventing them _____taken in the past.A. was notB. were notC. were not beingD. being not满分：2 分正确答案:B。