连词练习题(含答案)经典
高中英语连词经典习题(含答案)
高中英语连词经典习题(含答案)一、单项选择连词1．There are fewer teaching positions left in big cities, ________at the same time there are shortages of teachers in small towns.A．or B．andC．so D．for【答案】B【解析】考查连词。
or 表选择关系；and表并列关系；so和for表因果关系。
句子前后是并列关系，所以选B。
2．We shou ldn’t think the question of ________ they are poor or rich is important.A．what B．whether C．why D．how【答案】B【解析】考查考查名词性从句。
句意“我们不应该把他们是穷人还是富人看得太重要。
”whether常与or/or not连用，意为“是否......”。
故选B。
3．— How can I wake up so early?—Set the alarm at 5 o’clock,you’ll make it.A．but B．or C．and D．so【答案】C【解析】试题分析：考查情景交际和并列连词。
句意：--我怎样才能醒的很早？--把闹钟定到5点，这样，你就能做到了。
答语前后是并列关系，祈使句+and表示条件，相当于if条件句。
or 表示相反的情况，故选C。
考点：考查情景交际和并列连词4．He was about to tell me the secret __ _____ someone patted him on the shoulder.A．as B．until C．while D．when【答案】D【解析】试题分析：句意：她正要告诉我这个秘密，这时有人拍了一下她的肩膀。
beabouttodo...when...是固定句型，意为“正要做……这时……”。
初中英语连词题20套(带答案)含解析
初中英语连词题20套(带答案)含解析一、初中英语连词1．I've wanted to read Peter Pan for long, _________ today I finally borrowed the book from the library.A. orB. butC. andD. since【答案】 C【解析】【分析】句意：我一直想读《彼得潘》，今天我终于从图书馆借到了这本书。
A或者、否则；B但是，C和；D自从，句子前后是并列关系，则应用连词and，故选C。
【点评】此题考查联系辨析。
根据两句之间的关系确定所使用的连词。
2．You like football ___________ she likes reading.A. WhenB. orC. becauseD. while【答案】 D3．Giveme your email address, _______I'll send you the form.A. orB. andC. butD. nor【答案】 B4．Some people won't realize the importance of their health ____ they lose it.A. becauseB. afterC. whenD. until【答案】 D5．You will find it useful to learn to study by yourself _____ you go to college.A. whileB. untilC. SinceD. when【答案】 D6．Mark felt very bad today. __________, he kept working all day and said nothing about it.A. HoweverB. ThereforeC. OtherwiseD. Besides【答案】 A7．_____________ my brother arrived in Thailand, he visited the local biggest temple at once.A. As soon asB. WhileC. UntilD. Before【答案】 A8．He is getting fat, _______________ he has decided to go to work on foot.A. becauseB. thoughC. soD. and【答案】 C9．Study hard, _______ our parents will be disappointed.A. andB. butC. orD. because【答案】 C10．__________ the teacher came in, the students stopped reading at once.A. WhenB. WhileC. BeforeD. /【答案】 A11．Some people waste food___________ others haven't enough.A. whileB. duringC. whenD. which【答案】 A12．A recent survey shows that 44 percent of Americans want to use self-driving cars, _________ 34 percent believe that they will make the roads mote dangerous.A. althoughB. becauseC. if【答案】 A【解析】【分析】句意：一个近来的调查显示44%的美国人想要使用无人驾驶车，尽管34%的人相信它们会让道路更加危险。
连词练习题(及答案)
连词练习题(及答案)一、从属连词1．Don’t stop ________ you meet with a word you don’t understand.A．at that time B．each time C．sometimes D．before2．There is an illness that can result in total blindness ______ left untreated.A．after B．if C．since D．unless3．She usually took a walk along the riverside _____ her mother did before she went abroad. A．just like B．just as C．the way like D．which4．If you go exploring, you should prepare a good map, a compass, a raincoat, a cellphone to call for help____you get lost, and a bit of spare cash for emergencies.A．even if B．in case C．as long as D．as if5．No one can get access to the website and download any information from it ______ a correct password is entered.A．because B．unless C．when D．since6．I was about to watch a football match ________ my mother called me to buy drinks. A．while B．as C．when D．until7．________ things had been tough at times when he was in school, he graduated from college with the highest honor.A．If B．While C．Because D．As8．________ he is determined to do something, no one is able to persuade him to________. A．If; give away B．Although; give in C．As long as; give out D．Once; give up 9．He always had his camera ready whenever he traveled, just he saw something that would make a good picture.A．in case B．so that C．for fear that D．as if 10．Fortunately, someone called the fire department ________ the fire broke out.A．instantly B．the instantly C．instant D．an instant11．______ the pace of life continues to increase, we are fast losing the art of relaxation. A．Although B．Unless C．If D．As12．Your parents won't be satisfied with you ________you pass the final examination.A．until B．if C．unless D．otherwise13．______ you know who they are and what motivates them, think about the influencers in your organization.A．Just as B．Even though C．In case D．Now that14．________ the COVID-19 pandemic was a primary factor affecting enrolment of international students, the strained relationship between the US and China also accounted for it.A．As B．Since C．If D．While15．The two girls kept talking in the room ________ their mothers said goodbye to each other. A．when B．unless C．while D．until16．Many people welcome the chance to do meaningful things, ________they will get no pay.A．even if B．as if C．in case D．now that17．_________ there is good communication and mutual (相互的) understanding between parents and children, there will be no so-called generation gap between them.A．As soon as B．Even though C．So long as D．Even if18．The meeting didn’t start______ everyone was there.A．because B．until C．why D．if19．They didn’t start the work ______ their teacher came back.A．until B．while C．as soon as D．if20．________ she welcomes the new enterpreneurial spirit, she advises that people be realistic and seek guidance________ rushing into things.A．Since, when B．As, beforeC．Though, before D．Although, when二、并列连词21．After ten days’ traveling, the couple arrived home, _________.A．tired and delighted B．tired but delightedC．tiredly and delightedly D．tiredly but delightedly22．(2016·北京卷·单项填空) I am not afraid of tomorrow, ________ I have seen yesterday and I love today.A．so B．andC．for D．but23．I think Tom will make a good monitor, ________ I’d like to vote for him.A．but B．forC．or D．so24．I had just got up and was about to cook my breakfast______ the telephone rang loudly, but it hung up ______ I could answer it.A．while; when B．when; asC．as; after D．when; before25．China’s northernmost city Mohe in Heilongjiang province has turned into a fairyland covered with snow, ______ some places are still waiting for the first snow.A．until B．whileC．since D．before26．He was about to leave ______ the telephone rang.A．while B．as C．whether D．when27．He was about to go to bed ________ the doorbell rang.A．while B．as C．before D．when28．It turned out that this material was neither silk ________cotton.A．or B．nor C．not D．no29．The volcano erupted for the next two days. Many people were buried alive,__________was the city.A．so B．and asC．such D．and so30．—I hear Susan will go to Beijing by herself.—That’s true her father her mother will go with her.A．both, and B．either, or C．neither, nor 31．Although the Roma couldn’t be forced to pay taxes, they couldn’t vote ______they agreed to ______a government.A．unless, submit to B．until, correspond toC．when, resign to D．while, compromise to32．I've been away for only three years, ________ I can hardly recognize my hometown.A．so B．or C．for D．yet 33．Mexican and Tex-Mex foods were popular in the USA, ________ now Chinese food has more fans.A．because B．but C．so D．unless34．“________, but Jim made the same mistakes again,” complained his mother. A．Although he was told many times B．Having been told many timesC．As he was told many times D．He had been told many times35．Since these two countries are quite different in the social systems, it is ________ necessary ________ possible for the two sides to change each other.A．either; or B．both; and C．not; but D．neither; nor 36．After cleaning up the classroom, I felt tired ________ happy.A．nor B．but C．or D．so37．Describe your problems clearly,______other people can understand them easily.A．so B．but C．or D．for38．Life isn’t always beautiful, ________ the struggles make you stronger and the changes make you wiser.A．or B．so C．but D．for39．The coach shouted to the footballers, “Look around __________ you’ll miss the goal__________ with the ball.”A．and; run B．or; run C．and . running D．or; running 40．Don’t use your mobile phone while charging, ______ you may be shocked by electricity. A．or B．and C．but D．yet【参考答案】一、从属连词1．B【详解】考查连词。
连词专题训练(练习、答案、解析)
一、选择题( 15 题)1. Hurry up,_______we can ’t catch the bus.A.andB.orC.soD.but考查知识点：连词疑难点： or 有选“择”和否“则”两种意思，学生大多知道前者，但忽略后者，以致容易出错。
解析：题意为快“点，否则我们赶不上公交车” 。
根据题意，可知要填否“则” ，故用连词 or答案： B2._______Tina and Gina know Chinese.A.BothB.NeitherC.EitherD.But考查知识点：连词 both ……and 搭配疑难点：both ……and 搭配考查，须识记此短语解析： both ……and 表示“两者都”，符合意境。
答案： A3.She was_______surprised______she couldn ’t believe her eyes.A.too; toB.such; thatC.so; thatD.enough; to考查知识点：so ……tha t 的用法疑难点：so ……that 与such ……that 混淆解析： such 是形容词，修饰名词或名词词组；so 是副词，只能修饰形容词或副词。
根据 surprised 为形容词，故选 C答案： C4.I can’t understand this sentence_______there are no new words in it.A.ifB.becauseC.thoughD.as考查知识点：连词 though疑难点：不知道 though 是什么意思解析：此句意为“我不明白这句话 _______没有一个新单词在里面”。
由句意可知，此为让步状语句。
though 意为尽“管” ，可用来引导让步状语从句，符合。
答案： C5.You’ll be late_______you don ’t get up early tomorrow morning.A.ifB.whenC.beforeD.until考查知识点：连词 if 引导的条件状语从句疑难点： if 引导的条件状语从句，主句与从句的时态问题解析：根据语境，可知 if 适合，故选 A答案： A6.Hi, boys, please don ’t go back home_____the rain stops, or you ’ll get wet.A.becauseB.sinceC.butD.until考查知识点：连词not …… unt il疑难点：不记得 not …… until 的搭配解析：not …… until 意为，“直到……才”符合语境意思答案： D7.______you go across the road, you must be careful.A.SinceB.AfterC.WhenD.Before考查知识点：由连词 when 引导的时间状语从句疑难点：理解语境解析：由语境可知：当你过马路时，你必须要小心， C 符合答案： C8.She is listening to the music______he he is washing clothes.A.afterB.beforeC.whileD.until考查知识点：连词 while 的用法疑难点： while 与连续性动词连用，强调连个动作同时发生解析：根据前后谓语时态一致，可知其表示为两个动作同时进行，故选 while 答案： C9.Bill won’t make any progress_______he studies harder than before.A.ifB.whenC.becauseD.unless考查知识点：not …… until 用法疑难点： unless 与not …… until 容易混淆。
连词练习题(及答案)
连词练习题(及答案)一、从属连词1．I prefer capital cities to natural scenery ________the former boast more shopping centres and dining options.A．now that B．in that C．in case D．despite the fact that 2．There is an illness that can result in total blindness ______ left untreated.A．after B．if C．since D．unless3．How time flies! I feel junior high school was only yesterday!A．even if B．unless C．if D．as if4．________ both sides accept the agreement will a lasting peace be established in this region. A．As long as B．Only if C．If only D．Unless5．I was about to watch a football match ________ my mother called me to buy drinks. A．while B．as C．when D．until6．The words “level”, “kayak” and “racecar” are the same ________ they are read left to right or right to left.A．though B．as C．whether D．unless7．He was wondering in the street _________ he felt patted on the shoulder.A．as B．when C．while D．where8．— Sorry, Daddy. I am not getting on well with my studies.—Well. ________ you hadn’t wasted so much time playing online games.A．As if B．Even if C．If only D．Only if9．The little girl won’t go to sleep at noon _______ her mother tells her a story.A．or B．but C．if D．unless 10．Mother was worried because little Alice was ill, especially ________Father was away in France.A．as B．that C．during D．if11．_________ there is good communication and mutual (相互的) understanding between parents and children, there will be no so-called generation gap between them.A．As soon as B．Even though C．So long as D．Even if 12．Don’t stop ________ you meet with a word you don’t understand.A．at that time B．each time C．sometimes D．before13．The proposal, debated at this year’s CITES Conference, lists Mako sharks under Appendix II, meaning that they can’t be traded ______ it can be shown that fishing wouldn’t thr eaten their chances for survival.A．until B．unless C．whether D．when14．It is said in London you can experience four seasons within a day, so you should always bring an umbrella with you ________ it rains.A．as though B．now that C．in case D．even if15．-Why was William absent today?-That was________ he broke her leg in the basketball match.A．why B．because C．that D．/16．The manager said he supported the move________ he didn’t think it would make much of a differenceA．so that B．in order that C．now that D．even though 17．______ you know who they are and what motivates them, think about the influencers in your organization.A．Just as B．Even though C．In case D．Now that18．We packed all the books in the boxes________they wouldn't get damaged.A．as long as B．as if C．in case D．so that19．He always thinks __________he can do more for the people．A．of how B．how C．of that D．why20．________ she welcomes the new enterpreneurial spirit, she advises that people be realistic and seek guidance________ rushing into things.A．Since, when B．As, beforeC．Though, before D．Although, when二、并列连词21．It is difficult to remember and write Chinese traditional characters, they are a great part of Chinese culture. We should keep them.A．but B．and C．or D．until22．—How much did you spend repairing your computer?—I don’t remember, _____ it was quite a lot.A．but B．orC．for D．so23．The roof fell ______he had time to dash into the room to save his baby.A．before B．asC．after D．until24．China’s northernmost city Mohe in Heilongjiang provin ce has turned into a fairyland covered with snow, ______ some places are still waiting for the first snow.A．until B．whileC．since D．before25．Some people like dogs______ others like cats.A．while B．besidesC．and so D．when26．---How did she lose so much weight as expected？----_____________ eating less，she jogged for several miles every day.A．In addition to B．In spite ofC．Instead of D．Thanks to27．______ Mr Johnson _______his wife enjoy tennis.A．Either, or B．Both, and C．Not only, but also D．neither, nor28．24. Too much stress does you harm ________no stress makes you achieve little.A．or B．because C．since D．while29．Peter has previous experience, ______ I think he’s the right person for the job.A．or B．butC．for D．so30．I say Tom is a smart boy, he still needs to work hard to achieve his goal.A．Because B．When C．As D．While31．A person’s quality may usually be known by his behavior ________ by the friends he keeps. A．as well as B．as ifC．as soon as D．as usual32．I bought a new shirt for John, _____ he didn’t like it.A．becuase B．and C．but33．Lose one hour in the morning ________ you will be looking for it the rest of the day. A．but B．and C．or D．so34．I was about to go back to sleep I heard a strange noise.A．while B．as C．when D．then35．I've been away for only three years, ________ I can hardly recognize my hometown.A．so B．or C．for D．yet36．These activities can ________help them gain more skills, ________teach them to care about others.A．both; and B．not only; but also C．either; or D．neither; nor 37．—Why can't you get used to the life in Beijing?—________ the crowed traffic ________ the high living cost. The only reason is the badly polluted air.A．Not only; but also B．Either; or C．Both; and D．Neither; nor 38．Don’t use your mobile phone while charging, ________ you may be shocked by electricity. A．so B．orC．but D．while39．A lie can travel half way around the world ________ the truth is putting on its shoes.A．if B．whileC．unless D．until40．After reaching the top of the West Hill, we sat around ________.A．exhaustedly and happily B．exhausted and happyC．exhaustedly but happily D．exhausted but happy【参考答案】一、从属连词1．B【解析】【详解】考查固定短语和连词辨析。
【英语】连词练习题(含答案)
【英语】连词练习题（含答案）一、初中英语连词1.Although she is under great stress,she always wears a smile on her face.A. andB. orC. butD. /【答案】D2.Tom won't play computer games he finishes his homework.A. ifB. so thatC. unlessD. although【答案】C3.— I'm wondering she is willing to do it.—Don't worry. I don't doubt she can do it well.A. if; thatB. that; ifC. if; ifD. that; that【答案】A【解析】【分析】句意：一一我想知道她是否愿意做这件事。
一一别担心。
我很相信她能做好这件事。
根据wonder可知，宾语从句的连词是if,是否，doubt的否定形式引导的宾语从句连词是that，其后不缺少成分且语意完整，故选A。
【点评】考查连词，注意宾语从句的用法。
4.—will the meeting last?—we reach an agreement.A. How long; Not untilB. When; Not untilC. How long; UntilD. When; Till【答案】C【解析】【分析】句意：一一会议会持续多久？一一直到我们达成协议。
last是持续动词，提问持续动词所持续的时间用how long,故排除B和D选项，until表示动作的持续，故选C。
【点评】考查连词，注意how long和until的用法。
5.Could you tell me the singer will come to our school or not?A. ifB. whetherC. thatD. what【答案】B【解析】【分析】句意：你能告诉我歌手是否会来我们学校吗？whether...or not,固定搭配，是否，故选B。
连词练习题(含答案)
连词练习题(含答案)1.I woke up at six in the morning so that I could catch theearly bus to Nanjing.2.Tom will only play computer XXX.3."Bill。
don't smoke and you'll recover soon," the doctor advised.4.Although she is a very busy woman。
she still helps the boy.A。
while。
B。
or。
C。
but。
D。
and答案】C解析】【分析】句意：有些人浪费食物，而另一些人却没有足够的食物。
but表示转折关系，符合句意。
XXX表示对比，or表示选择，and表示并列，都不符合句意。
故选C。
点评】考查连词辨析。
注意连词的意思和用法，结合句意，选出正确答案。
改写后的句子：有些人浪费食物，但是另一些人却没有足够的食物。
9.Although three fourths of the Earth's surface is covered with water。
97 percent of it is ater in the sea.10.You can take either the train or the bus there。
It will take the same amount of time.11.She got up late。
so she missed the bus.12."Since you have one ticket left。
either my sister or I will go with you," said the speaker。
"Oh。
I'm really sorry。
Then what about next time?"13.He has decided to go to work on foot because he is getting fat.14."I'm XXX。
连词练习(含答案)
A．asB．that
C．whichD．where
【答案】A
【解析】
试题分析：考查惯用法及连接词。as it is是惯用词，意思是：像现在这样，事实上,实际上。句意：如果你要过上快乐的生活，你最好要学会接受生活本来的样子（即生活的真实面目）。
考点：考查惯用法及连接词。
17．Stephen Hawking believes that the earth is unlikely to be the only planetlife has developed gradually.
A．which B．what C．them D．those
【答案】A
【解析】考查定语从句。句意：英语是几种不同文化共同使用的语言，每种不同的文化都会不同的使用它。根据与前面句子之间是逗号，没有连词，故判断后一句是定语从句；这里用which代指several diverse cultures，引导非限制性定语从句。故选A。
A．unless B．while
C．once D．if
【答案】A
【解析】
【详解】
考查从属连词辨析。句意：我们所有的设备都可以追溯到20世纪60年代和70年代；除非我们能买到必要的技术，否则我们不能生产与外国产品相竞争的产品。A. unless除非；B. while当…时候；C. once一旦；D. if如果。分析句子可知，本句为条件状语从句，所以应用表示条件的从属连词，故unless符合句意。故A选项正确。
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
连词练习题(含答案)经典一、初中英语连词1．The situation is becoming more serious ________________ we do something to save the Earth.A. ifB. whenC. becauseD. unless【答案】 D2．It is hard to review the knowledge we learn in class ___________ we take notes.A. ifB. unlessC. whenD. after【答案】 B3．Cathy is afraid of the dog. She will run away ____she sees it.A. ever sinceB. althoughC. as soon asD. so that【答案】 C【解析】【分析】句意：凯西害怕狗。
她以看见狗就逃走。
A.自从；B.虽然、即使；C.一……就；D.以便。
这是一个主从复合句，挖空处后引导一个时间状语从句，连词用as soon as，一……就，故答案选C。
【点评】考查连词辨析。
注意选项的意思和用法。
4．_____________ Chinese, we study English, Maths and physics in school.A. ExceptB. BesidesC. BesideD. Without【答案】 B【解析】【分析】句意：除了语文，在学校我们还学习英语，数学和物理。
A： Except，除了……，不包括后面的部分。
B：Besides，除了……还有，包括后面的部分。
C：Beside，在……旁边。
D： Without，没有。
根据Chinese, we study English, Maths and physics in school.可知，在学校我们要学习语文，数学，英语和物理，所以包括语文，要用besides，故选B。
【点评】考查连词辨析。
注意词意和用法，结合句意和语境，选出正确答案。
5．The Great Wall is famous lots of visitors all over the world come to visit it every year.A. so; thatB. such; thatC. enough; thatD. very; that【答案】 A【解析】【分析】句意：长城是如此著名，以至于每年都有许多世界各地的游客来参观它。
enough和very不引导从句，故C，D选项被排除，so+形容词+that，引导结果状语从句，such+名词+that，引导结果状语从句，famous是形容词，故选A。
【点评】考查连词辨析，注意such+名词+that，引导结果状语从句的用法。
6．Your spoken English will get better and better ______________ you practise speaking more.A. beforeB. ifC. thoughD. until【答案】 B【解析】【分析】句意：如果你多练习说英语，你的英语口语会越来越好。
A：before 在……前； B： if 如果；C： though 虽然；D： until直到……才（止）。
根据前后句意思，可知后句是前句发生的条件，故选B。
【点评】考查连词辨析。
根据前后句的关系，选择正确的连词。
7．You'll have a great time ______________ you go to the party.A. soB. ifC. although【答案】 B【解析】【分析】句意：如果你去参加聚会，你会玩得很开心的。
A：so因此，表示结果； B： if 如果，表示条件；C： although尽管，表示让步。
根据前后句的意思，可知后句是前句的条件，故选B。
【点评】考查连词辨析。
理解连词意思和用法，根据前后句的关系，选择正确的连词。
8．_________ we didn't win the basketball game, we were satisfied with our hard work.A. IfB. ThoughC. SinceD. Because【答案】 B【解析】【分析】句意：虽然我们没有赢得篮球赛，但我们对我们的努力感到满意。
A：If 如果，表示假设条件；B：Though 虽然，表示转折；C：Since既然；明显的原因；D：Because因为，表示原因。
根据前后句意思，可知前后句是转折关系，要用though，故选B。
【点评】考查连词辨析。
理解连词的意思和用法，根据前后句的关系，选择正确的连词。
9．Love your parents __________ they are alive. Don't wait until it is too late.A. whileB. thoughC. becauseD. unless【答案】 A【解析】【分析】句意：当你父母活着时爱他们。
不要等到太迟才行动。
while当……时候；though虽然；because因为；unless除非，故选A。
根据句意只有A选项是正确的，其它选项翻译不通，故选A。
【点评】此题考查连词辨析。
弄清每个连词意思，根据语境和句意确定所使用的连词。
10．Some people waste food___________ others haven't enough.A. whileB. duringC. whenD. which【答案】 A11．___________three fourths of the Earth's surface is covered with water, 97 percent of it is salt water in the sea.A. ButB. AlthoughC. AsD. However【答案】 B12．— Since you have one ticket left, ____ my sister_____ I will go with you.— Oh, I'm really sorry. Then what about next time?A. both; andB. either; orC. neither; norD. not only; but also【答案】 B【解析】【分析】句意：——既然你只剩下一张票，要么我妹妹要么我和你一起去。
——哦，我真的很抱歉，那下次呢？根据只剩下一张票，可知只能去一个人，A两个都，B两个都不，C两者之一，D不但而且，故选B。
【点评】考查连词，注意either，or的用法。
13．He is getting fat, _______________ he has decided to go to work on foot.A. becauseB. thoughC. soD. and【答案】 C14．Tim is crazy about DIY. He continues doing it _____he meets up with difficulties.A. thoughB. soC. butD. or【答案】 A【解析】【分析】句意：蒂姆酷爱自己动手，尽管遇到了困难，他还是继续做这件事。
A尽管，B所以，C但是，D或者，根据遇到了困难还是继续做这件事，可知是让步状语从句连词though，故选A。
【点评】考查连词，注意though的用法。
15．Peter bought some goldfish ______________ he found it difficult to raise them.A. becauseB. orC. thoughD. until【答案】 C16．_____________ my brother arrived in Thailand, he visited the local biggest temple at once.A. As soon asB. WhileC. UntilD. Before【答案】 A17．—Learning to love is like learning to walk.—Yes, ______ we step out bravely, we'll find it's not so difficult.A. as a resultB. even thoughC. as long asD. as far as【答案】 C18．—The air pollution is terrible.—It will be worse ______ we take action to protect the environment.A. ifB. unlessC. untilD. when【答案】 B19．He knows a lot, ________ he is just a child.A. howeverB. thoughC. andD. because【答案】 B20．Giveme your email address, _______I'll send you the form.A. orB. andC. butD. nor【答案】 B21．——What do you think of our school basketball team?——They're going to lose the match __________ they improve their skills.A. unlessB. untilC. ifD. as【答案】 A22．You like football ___________ she likes reading.A. WhenB. orC. becauseD. while【答案】 D23．___________ you know the answer, please ___________ your hand.A. If; raiseB. If; riseC. Unless; raiseD. Unless; rise【答案】 A24．My mother has little interest in football ___________ she didn't watch the live match on TV yesterday evening.A. soB. ifC. thoughD. when【答案】 A25．The film is really exciting. ______the students ______ their teacher is enjoying the film.A. Both; andB. Not only; but alsoC. Either; orD. Neither; nor【答案】 B26．________ you sit in front of the computer all day while working, you'd better take exercise for at least an hour every day.A. Even ifB. Even thoughC. SinceD. As if【答案】 C【解析】【分析】句意：既然你整天坐在电脑前工作，你最好每天锻炼至少一小时。