17秋学期《大学英语(一)》在线作业1满分答案
《大学英语一》作业参考答案（1）
《大学英语一》作业参考答案（1）《大学英语一》作业参考答案Part I. Conversation1-5 BDCAD 6-10 BDBCD 11-15 DADBA 16-20 BADCB Part II. Reading ComprehensionPassage 1 1.C 2.A 3.D 4.D 5.BPassage 2 1.B 2.C 3.D 4.C 5.APassage 3 1.B 2.D 3.C 4.A 5.APassage 4 1.C 2.A 3.D 4.D 5.BPassage 5 1.C 2.A 3.D 4.A 5.BPassage 6 1.A. 2.D 3.A 4.D 5.APassage 7 1.D 2.B 3.D 4.A 5.CPassage 8 1.A 2.D 3.B 4.D 5.CPassage 9 1.D 2.B 3.A 4.D 5.APassage10 1.B 2.A 3.C 4.D 5.CPassage11 1.D 2.D 3.B 4.B 5.BPassage12 1.C 2.B 3.A 4.D 5.BPart III. Vocabulary and Structure1.B2.D3.C4.A5.D6.A7.C8.D9.C 10.A11.A 12.A 13.A 14.B 15.B 16.B 17.D 18.A 19.D 20.D 21.B 22.B 23.A 24.B 25.C 26.C 27.B 28.D 29.B 30.B31.C 32.C 33.C 34.A 35.C 36.B 37.D 38.D 39.A 40.D41.C 42.C 43.B 44.A 45.A 46.B 47.D 48.D 49.C 50.A51.B 52.C 53.B 54.A 55.D 56.A 57.B 58.C 59.B 60.B61.B 62.C 63.D 64.A 65.C 66.B 67.A 68.C 69.A 70.D71.A 72.D 73.A 74.B 75.A 76.B 77.A 78.C 79.D 80.BPart IV. Translation1. 女人坠入爱河时容易变得浪漫。
XXX17秋《大学英语1(本科)》在线作业
XXX17秋《大学英语1(本科)》在线作业B。
Have a safe trip.C。
XXX.D。
Good luck.满分：2分正确答案:B改写建议：1.我们一直在培养我们的战士以适应市民社会。
(原句已无格式错误)2.他们给奶奶买了一份礼物，她很喜欢。
(原句已无格式错误)3.受伤的人们宁愿死也不投降。
(原句已无格式错误)4.请问，怎样才能到车站？在第一个红绿灯左拐，你就不会错过它了。
(原句已无格式错误)5.没有你们的支持，我们就不可能成功。
(原句已无格式错误)6.我们和好了。
(原句已无格式错误)7.她唱歌真美！我从未听过这么好听的声音。
(原句已无格式错误)8.我明天要去伦敦了，祝我一路平安。
(原句已无格式错误)C。
are cleanedD。
have been cleaned满分：2分正确答案:C9.Did you not see the man to whom I nodded just now?10."I'd love to。
Where shall we meet?" replied the person to the XXX play cards.11.In recent years。
XXX us the idea that the further we go。
the better our holiday will be.12.It's high time the children went to school.13.XXX.14.They all went to the museum。
but I XXX't.15.The windows of the room are cleaned once a week.16."How are things with you。
Jimmy?" asked the speaker。
"I'm terribly busy these days."17.To some degree。
大工17秋《大学英语1(远程英语1)》
B.正确
正确答案:A
3.To understand the passage, he reads it again and again.
A.错误
B.正确
正确答案:B
4.The reduced price will save you one dollar for each dozen.
1.I've never heard the word using in spoken English.
A.错误
B.正确
正确答案:A
2.When Chopin was sixteen, he attended the Warsaw Conservatory of Music, directing by composer Joseph Elsner.
正确答案:B
7.I'm glad to make an acquaintance,Mr Smith.
A.错误
B.正确
正确答案:A
8.He was seen enter the building.
A.错误
B.正确
正确答案:A
9.The student corrected his paper carefully, following the professor's suggestions.
A.错误
B.正确
正确答案:B
5.People living in the city do not know the pleasure of country life.
A.错误
B.正确
正确答案:B
6.Some bacteria can cause disease.
17秋北交《大学英语上》在线作业一1
北交《大学英语上》在线作业一试卷总分:100 得分:100一、单选题 (共 25 道试题,共 100 分)1. How beautifully she sings!I have never heard____________.A. the better voiceB. a good voiceC. the best voiceD. a better voice满分：4 分正确答案:D23. I have no idea____________ they have kept in touch with me by E-mail since last year.A. whatB. howC. thatD. when满分：4 分正确答案:C3. ____________, they made their way through the street.A. He guidedB. With his guidingC. He is guidingD. He had guided满分：4 分正确答案:B18. The village____________my mother grew up in is not far from the city.A. whatB. whereC. whichD. wherever满分：4 分正确答案:C5. He was willing to speak to the reporters____________ he was not identified.A. on condition thatB. in caseC. suppose thatD. for fear that满分：4 分正确答案:A23. Word has come____________some guests from Canada will visit our school.A. whatB. thatC. whetherD. when满分：4 分正确答案:B24. If he had worked harder, he ____________the exams.A. must have got throughB. would get throughC. would have got throughD. could get through满分：4 分正确答案:C12. ____________right now, she would get there on Sunday.A. Would she leaveB. If she leavesC. Were she to leaveD. If she had left满分：4 分正确答案:C9. We redoubled our efforts, each man____________like two.A. workedB. been workingC. workingD. to be worked满分：4 分正确答案:C2. Can you find out ____________her pen?A. where Alice had putB. where had Alice putC. where Alice has putD. where has Alice put满分：4 分正确答案:C8. The meeting____________over, the representatives went to visit the farm.A. beeB. beingC. isD. to be满分：4 分正确答案:B19. It is vital that enough money____________to fund the subject.A. be collected#must be collectedB. is collectedC. can be collected满分：4 分正确答案:A18. Her children____________far away from her, the old lady feels lonely sometimes.A. to liveB. livingC. livedD. having lived满分：4 分正确答案:B14. Frank plays____________Alex.A. a lot more better thanB. a lot better thanC. much more better thanD. much more well than满分：4 分正确答案:B3. Do ____________you are told; otherwise you will be punished.A. thatB. whatD. whom满分：4 分正确答案:B16. Do you know ____________?A. when does the party startB. whether the party startsC. what time the party startsD. if the party starts满分：4 分正确答案:C17. No one was aware____________Jane had gone.A. where thatB. of the placeC. of whereD. he place满分：4 分正确答案:C18. Boris has brains. In fact，I doubt whether anyone in the class has ____________IQ.A. a highB. a higherC. the higherD. the highest满分：4 分正确答案:B19. The music was so loud. That's ____________he left the party so early.A. howrB. whyC. whatD. when满分：4 分正确答案:B10. This room is____________much larger than that one.A. noC. no aD. as满分：4 分正确答案:A9. If only the committee____________he regulations and put them into effect as soon as possible.A. approveB. would approveC. can approveD. sill approve满分：4 分正确答案:B7. Is this the place ____________the exhibition was held?A. whereB. thatC. on whichD. the one满分：4 分正确答案:A23. The soldiers jumped into the river____________past their ears.A. with bullets whistlingB. with bullets whistledC. with bullets to whistleD. with bullets being whistling满分：4 分正确答案:A24. ____________,we will set off as we planned.A. Were it good or badB. Be it good or badC. Being good or badD. Whether good or bad满分：4 分正确答案:B22. I will give this book to____________wants to have it.A. whomeverB. whoeverC. whateverD. wherever满分：4 分正确答案:B。
东大17秋学期大学英语在线作业1答案
17秋18春《大学英语(一)》在线作业1阅读明白得完型填空一、单项选择题（共 25 道试题，共 50 分。
）1. He smoking because it does harm to health.A. changeB. pauseC. quitD. learn正确答案：C2. The experiment involves _____ on some mice.A. to operatingB. operatingC. to be operatingD. in operating正确答案：B3. There may be something wrong with her ___. She can' t see things clearly.A. eyesB. earsC. mouthD. nose正确答案：A4. Our teacher is very strict ourselves our studies.A. in; withB. with; inC. about; withD. with; about正确答案：B5. He has won wide _____ in the field of occupational medicine.A. recollectionB. professionC. recognitionD. production正确答案：C6.He's so careless that he always _______ his school things at home.A. forgetsB. leavesC. putD. buys正确答案：B7. Ten dollars will _____the cost of the damageA. needB. payC. coverD. spend正确答案：C8.The policeman stopped ________, but he _______ no sound.A. hearing,heardB. listening,listenedC. to listen,heardD. listening to,listened to正确答案：C9.While she _________ TV in the sitting room, the bell________.A. watches, ringsB. is watching, rangC. was watching, rangD. watched, was ringing正确答案：C10. I have seen that this method had been_____by many people.A. appliedB. demandedC. ownedD. disagreed正确答案：A11. The museum has some new _____from India.A. exhibitB. exhibitionC. exhibitsD. exhibitions正确答案：C12.________ I close the window? It's so cold here.A. WillB. DoC. WouldD. Shall正确答案：D13. _________ away the old books and __________ me that new one.A. Bring, bringB. Bring, takeC. Take, takeD. Take, bring正确答案：D14.Our teacher told us the earth ________ round the sun all the time.A. movedB. travelsC. goingD. circle正确答案：B15. A good habit can make our mental health in with physical health.A. concernB. connectionC. compareD. tune正确答案：D16. _____ all her other qualifications. Mary was an excellent cook.A. exceptB. in addition toC. besidesD. except for正确答案：B17. Did it snow _______ last night ?A. heavyB. heavilyC. quickD. fast正确答案：B18.-- Bob, would you like to come to our dinner party? --__________.A. Yes, I wouldB. Yes, I' d love toC. No, I wouldn' tD. No, I don't go正确答案：B19.-- What are you going to do next Sunday? --_____________.A. I' m sorryB. Here you areC. I' ve no ideaD. That' s all right正确答案：C20.Kate says that she _______ a message on the desk.A. will leaveB. leaveC. will giveD. give正确答案：A21.--Must I clean the room now? --No, you __________.A. can' tB. may notC. mustn' tD. needn' t正确答案：D22. The answer must ________ in finding alternative sources of energy.A. happenB. layC. proveD. lie正确答案：D23. I have all the information relevant_____ the negotiation.A. inB. toC. onD. for正确答案：B24. It is not _____to quarrel with your boss.A. worthyB. worthC. valueD. valuable正确答案：A25. What is the correct _____for obtaining a refund?A. stepB. processC. procedureD. method正确答案：C17秋18春《大学英语(一)》在线作业1阅读明白得完型填空二、阅读明白得（共 4 道试题，共 20 分。
17秋《大学英语1（本科）》在线作业2、3及答案
17秋《大学英语1（本科）》在线作业2、3及答案17秋《大学英语1(本科)》在线作业2一、单选题（共 40 道试题，共 80 分。
）V1. Hardly _______ on stage _______ the audience started cheering.A. he had come / thanB. he had come / whenC. had he come / whenD. had he come / than满分：2 分2. Last year Mike earned _______ his brother, who has a lower position.A. twice as many asB. twice as much asC. twice thanD. twice as more as满分：2 分3. —I’m terribly sorry that I’ve spilled some coffee on the carpet. — _______A. Sorry.B matter.. It doesn’tC. That’s right.D. Don’t mention it.满分：2 分4. Mother doesn’t know _______ the hammer after her son had used it!A. where did her son putB. where her son puttingC. where her son putD. where to put满分：2 分5. The girl is ______ of a film star.A. somebodyB. somethingC. anybodyD. anyone满分：2 分6. — Shall we sit up here on the grass or down there near the water? — _______A. I’d rather stay here if you don’t mind.B. Sorry, I don’t like neither.C. Certainly, why not?D. Yes, we like these two places.满分：2 分7. — The physics exam is not difficult, is it? — _______. Even Harry _______ to the topstudents failed in it.A. Yes; belongsB. No; belongedC. Yes; belongingD. No; belonging满分：2 分8. —Hello, may I talk to the director now? —______A. Sorry, he is busy at the moment.B. No, you can’t.C. Sorry, you can’tD. I don’t know.满分：2 分9. When Lily came home at 5 p.m. yesterday, her mother ______ dinner in the kitchen.A. cookedB. was cookingC. cooksD. has cooked满分：2 分10. I didn’t hear the phone. I _______ asleep.A. must beB. should beC. must have beenD. should have been满分：2 分11. —It’s rather cold in here. Do you mind if I close the window? —______A. Yes, please.B. No, go ahead.C. Sure, please.D. I don’t like it.满分：2 分12. The young _______ interested in pop music.A. isB. haveC. hasD. are满分：2 分13. It is required that all the teachers in the department ______ on a picnic next Saturday.A. to goB. wentC. goD. might go满分：2 分14. _______ his examination of the patient, the doctor wrote out a prescription.A. Having finishedB. FinishingC. FinishedD. Having been finished满分：2 分15. Jane’s dress is similar in design ______ her siste’s.A. likeB. withC. toD. as满分：2 分16. —I was worried about my maths, but Mr. Brown gave me an A. —______A. Don’t worry about it.B. Congratulations! That’s a difficult course.C. Mr. Brown is very good.D. Good luck to you!满分：2 分17. Today’s weather is ______ worse than yesterday’s.A. veryB. muchC. very muchD. much too满分：2 分18. — Do you mind my smoking here? — ______A. No, thanks.B. Yes, I do.C. Yes, I’d rather not.D. Good idea.满分：2 分19. — This box is too heavy for me to carry upstairs. — _______A. You may ask for help.B. Let me give you a hand.C. Please do me a favor.D. I’d come to help满分：2 分20. — I'm afraid I've got a terrible flu. — ______.A. Never mindB. Keep away from meC. Better go and see a doctorD. You need be more careful满分：2 分21. A police officer claimed that the young man had attempted to _______ paying his fare.A. avoidB. rejectC. refuseD. neglect满分：2 分22. —May I see your tickets, please? —______A. No, they are mine.B. No, you can’t.C. Sure.D. Yes, you can.满分：2 分23. I was satisfied with her explanation, ______.A. so my classmates wereB. so were my classmatesC. so my classmates didD. so did my classmates满分：2 分24. _______ tomorrow’s lessons, Frank has no time to go out with his friends.A. Not preparingB. Not having preparedC. Not to prepareD. Being not prepared满分：2 分25. —David injured his leg playing football yesterday. —Really? ______A. Who did that?B. What’s wrong with him?C. How did that happen?D. Why was he so careless?满分：2 分26. — Hi, is Mary there, please? — _______A. Hold on. I’ll get her.B. No, she isn’t here.C. Yes, she lives here.D. Yes, what do you want?满分：2 分27. Do you know the man ______ under the apple tree?A. layB. lainC. lyingD. laying满分：2 分28. Would you like something _______?A. drinkB. to drinkC. drinkingD. for drinking满分：2 分29. Bob said that it is easy______.A. for him being on timeB. being on time for himC. for him to be on timeD. on time for him满分：2 分30. People at the party worried about him, because no one was aware _______ he had gone.A. of whereB. of the place whereC. whereD. the place满分：2 分31. The students were all entertained in a Mexican restaurant, at Professor Brian’s ______A. moneyB. payC. expenseD. loss满分：2 分32. While I was in the university, I learned taking a photo, _______ is very useful now for me.A. itB. whichC. thatD. what满分：2 分33. — Why does he look sad? — There are so many problems _______.A. remaining to settleB. remained settlingC. remaining to be settledD. remained to be settled满分：2 分34. How much has the company _______ this year?A. brought inB. brought downC. brought outD. brought on满分：2 分35. —What a beautiful dress you’re wearing! — ______.A. No,thanksB. Thank youC. Yes, it isD. Sorry, it isn’t满分：2 分36. The wild flowers looked like a soft orange blanket _______ the desert.A. coveringB. coveredC. coverD. to cover满分：2 分37. We are interested in the weather because it ______ us so directly — what we wear, whatwe do, and even how we feel.A. benefitsB. affectsC. guidesD. effects满分：2 分38. — Do you mind changing seats with me? — _______A. Yes, you can.B. Of course, I like to.C. No, I don’t mindD. Certainly, please do.满分：2 分39. Never before ______ see such a terrible car accident on the road!A. I haveB. have IC. I didD. did I满分：2 分40. There’s lots of fruit _______ the tree. Our little cat is also in the tree.A. inB. atC. underD. on满分：2 分二、判断题（共 10 道试题，共 20 分。
北大17秋《36081001大学英语1第二组》在线作业参考答案
C.How much is the meat?
D.How much do you know?
8 —( a). —Yes, I think so.
A.Am I supposed to get over and see Caroline?
B.I went to see Caroline this morning.
A.I hope you"re enjoying your stay here.
B.What is the weather like today?
C.What is the weather?
D.Are you feeling sick?
4 —( b). It will help you a lot. —That’s a good idea. Let’s make some.
A.What do you mean by that?
B.Would you please see that again?
C.Do you speak English?
D.I"m sorry. I can"t follow you.
7 —( c). —Ten yuan a kilo.
A.How many do you want?
C.How are you?
D.Oh, here is my card. You can have a look.
11 —Are there many drugstores around here? —( b).
A.Yes, it is.
B.Yes, there is one on the left corner.
北大17秋季36081001-大学英语1-第一组答案
一、英译汉(共35题，每题2分，共70分)鼓励独立完成作业，严惩抄袭。
1. Tom's father has taught English here since he graduated from Peking University.汤姆的爸爸从在北京大学毕业后就在这里教英语了。
试题编号：试题类型：简答题标准答案：***试题难度：一般试题解析：***考生答案：汤姆的爸爸从在北京大学毕业后就在这里教英语了。
考生得分：***是否评分：未评分评价描述：***2. Don’t you know that all the animals are good friends now?你难道不知道现在所有的动物都是好朋友吗？试题编号：试题类型：简答题标准答案：***试题难度：一般试题解析：***考生答案：你难道不知道现在所有的动物都是好朋友吗？考生得分：***是否评分：未评分评价描述：***3. Economists study the way a society uses scarce resources such as land, labor and raw materials.经济学家研究的是社会是如何利用诸如土地，劳动力还有原材料等稀缺资源。
试题编号：试题类型：简答题标准答案：***试题难度：一般试题解析：***考生答案：经济学家研究的是社会是如何利用诸如土地，劳动力还有原材料等稀缺资源。
考生得分：***是否评分：未评分评价描述：***4. He wanted to help all the wounded people no matter which side they were fighting for.。
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17秋学期《大学英语（一）》在线作业试卷总分:100 得分:100一、单选题1. One of the sailors found it necessary to ____ the captain ____ the nearest island by radio.A. declare … to contactB. propose … contactC. insist … to contactD. wish … contact正确答案:B2. You look very tired. You ____ too hard these days.A. could have workedB. ought to have workedC. should have workedD. must have worked正确答案:D3. Williams ( )in London, not in China.A. liveB. livesC. is live正确答案:B4. A: Should I take some medicine? B: No, you don't ( )to take any medicine.A. shouldB. mustC. need正确答案:C5. “Big Jim” ought to ____ before he was found holding up the assembly line again.A. be firedB. get firedC. have been firedD. had been fired正确答案:C6. One of the most remarkable developments in ____ electronic age has been the televising of college-level courses.A. everyB. suchC. theD. each正确答案:C7. The quality inspector ____ finished products carefully to make sure each was in good condition.A. looked overB. found outC. held upD. stuck to正确答案:A8. Our house is located at the foot of a hill, ____.A. it’s facing a streamB. it’s faced a streamC. its front facing a streamD. its front faced a stream正确答案:C9. A:What do you do? B: ( ).A. I am washing the dishes nowB. I am a policemanC. I do my homework正确答案:B10. A:The area is too noisy. B: Yes, I agree. It's ( ).A. no enough quietB. not enough quietC. not quiet enough满分：2 分正确答案:C11. I don’t think she knows how to dress herself properly. ____ is not to my taste.A. That she wearsB. What she wearsC. She wears thatD. She wears something满分：2 分正确答案:B12. ( ) people are my friends. ( ) people are my husband's friends.A. These, ThoseB. This, ThatC. Here, There满分：2 分正确答案:A13. Forced by his heartless son into signing the paper, the poor old man could do nothing but tremble and ____.A. flutterB. splutterC. chatterD. clatter满分：2 分正确答案:A14. Her friend called her name three times, but she didn’t reply, ____ deep in thought.A. no matter howB. as ifC. even thoughD. by far满分：2 分正确答案:B15. I am planning a new marketing campaign at the moment. ( )?A. What do you doB. What you are doingC. What are you doing满分：2 分正确答案:C16. The rise in the price has ____ people’s reluctance to purchase this product.A. made sureB. resulted inC. laid outD. kept up with满分：2 分正确答案:B17. Not until darkness fell ____ he hadn’t done half of his work.A. that he realizedB. that he didn’t realizeC. did he realizeD. didn’t he realize满分：2 分正确答案:C18. He is a good student. He never ( )late.A. comeB. comesC. goes满分：2 分正确答案:B19. She ( ) the flat advertisement.A. has a problem withB. has a problem forC. has a problem of满分：2 分正确答案:A20. I was listening to the radio ____ washing clothes.A. asB. whileC. the timeD. when正确答案:B21. ____ you do is for my good. I know this all the time.A. All whatB. All whichC. WhateverD. Whichever满分：2 分正确答案:C22. My father ( ) for an important phone call at the moment. He can't go to have lunch with you, I am afraid.A. waitB. waitingC. is waiting满分：2 分正确答案:C23. Polly is very busy. She ( )work at about 7.00 every day.A. finishB. does finishesC. finishes满分：2 分正确答案:C24. I’m confused a bout your intention and can ____ decide on what to do.A. necessarilyB. undoubtedlyC. previouslyD. barely满分：2 分正确答案:D25. Anyone who has something interesting to ____ won’t find life boring.A. look overB. pull intoC. set asideD. concentrate on正确答案:D26. ( )would you like, tea or coffee?A. HowB. WhyC. What满分：2 分正确答案:C27. The Business Banking Department is on ( )second floor.A. /B. anC. the满分：2 分正确答案:C28. My mother is a doctor. She is ( ) medicine.A. fromB. atC. in满分：2 分正确答案:C29. The result was even worse than ____.A. I had imaginedB. I would imaginedC. my imaginingD. mine imagination满分：2 分正确答案:A30. You should not try to ____ while others are talking.A. interruptB. deliverC. extendD. pretend满分：2 分正确答案:A31. A:Hello. I'm David Manning. Nice to meet you. B: ( ).A. I'm nice, tooB. Fine, thank youC. Nice to meet you too. I'm Xiaoyan满分：2 分正确答案:C32. Polly goes to a gym twice ( )week with her friends.A. /B. aC. the满分：2 分正确答案:B33. A:Could you ring them up please? I'm sometimes quite nervous on the phone. B:( ).A. Are you? I am fine.B. Yes, why don't you call them?C. Yes, of course. I will phone them for you.满分：2 分正确答案:C34. While the chairman was giving a talk at the meeting, some workers at the back paid no attention and kept ____.A. chatteringB. enduringC. relievingD. mentioning满分：2 分正确答案:A35. But I ( ) weight if I don't exercise.A. put upB. put onC. put with满分：2 分正确答案:B36. Communication is necessary and fruitful between different ____.A. DistractionsB. reactionsC. generationsD. relaxations满分：2 分正确答案:B37. A: I like documentaries on TV. B: ( ).A. So am IB. So do IC. So have I满分：2 分正确答案:B38. London is ( ) capital of Britain, and it is ( )_ great city, too.A. a, theB. the, /C. the, a满分：2 分正确答案:C39. We ____to Guilin for holiday last month, but my wife caught a bad cold and we had to cancel the trip.A. were to goB. goC. should have goneD. must have gone满分：2 分正确答案:C40. The quality inspector ____ finished products carefully to make sure each was in good condition.A. looked overB. found outC. held upD. stuck to满分：2 分正确答案:A41. A: I haven't got a car. B: ( ).A. Neither have IB. Neither do IC. Neither am I满分：2 分正确答案:A42. James is ( ) French than Polly.A. a bit better atB. a bit more good atC. a bit good at满分：2 分正确答案:A43. ( )people are coming for the party?A. How oftenB. How muchC. How many满分：2 分正确答案:C44. Mr Green is now ( ) a holiday.A. inB. withC. on满分：2 分正确答案:C45. The ground control had been receiving signals from the plane before they suddenly ____.A. broke offB. came downC. grew upD. turned over满分：2 分正确答案:A46. In the past few days we have ____ the importance of further research in thisfield.A. set asideB. pulled intoC. talked overD. carried out满分：2 分正确答案:D47. As the rain was getting heavier, the tourists were forced to ____ for the hotel where they were staying.A. find outB. come throughC. set offD. go over满分：2 分正确答案:C48. Sally's parents ( )come and stay with her soon.A. are goingB. are going toC. is going to满分：2 分正确答案:B49. Those pupils who take an excessive interest in computer games ought to spend more time on ____ readings.A. complexB. radicalC. worthwhileD. permanent满分：2 分正确答案:C50. This book is an ____ to discuss some interesting social problems.A. AdditionB. attemptC. activityD. assignment满分：2 分正确答案:B。