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)
2．_______ your opinions aremittee finds it unwise to place too much importance on them.
A．AsB．SinceC．Once D．While
【答案】D
A．Where B．Before C．Until D．Unless
【答案】A
【解析】考查连词。A. Where在…地方；B. Before在…前；C. Until直到；D. Unless除非。句意：在失业率和犯罪率居高不下的情况下，人们可以假定后者是由前者造成的。表示在…情况，故选A.
9．______ you fully understand the instructions of the experiment, your life won’t be secured.
A．butB．andC．orD．for
【答案】B
【解析】
试题分析：句意：我没吃晚饭，现在我快要饿死了！由句意可知，空格处应该是缺少表示递进的连词，but表转折，or表选择，for表原因，只有and表递进，故选B。
考点:考查连词的用法。
7．Don’t give up regardless of difficulty and failure, ________ you’ll never achieve your goals.
【解析】While尽管，在本题中引导让步状语从句。尽管你的观点值得考虑，委员会发现过于重视它们是不明智的。
3．To live in honor,he came from a poor family, was his ambition.
A．though B．if C．unless D．however
【英语】高中连词练习(附答案)
【英语】高中连词练习(附答案)一、单项选择连词1．I was glad to meet Jenny again, _______ I didn’t want to spend all day with her．A．but B．and C．so D．or【答案】A【解析】本题考查连词。
句意：我很高兴再次见到Jenny，但是我不想整天都和她呆在一起。
but：但是，表示转折关系；and：并且，表示并列关系；so：所以，表示因果关系；or：或者，否则，表示选择关系。
选A。
考点：连词／连接词2．______ unemployment and crime are high, it can be assumed that the latter is due to the former.A．Where B．Before C．Until D．Unless【答案】A【解析】考查连词。
A. Where在…地方；B. Before在…前；C. Until直到；D. Unless除非。
句意：在失业率和犯罪率居高不下的情况下，人们可以假定后者是由前者造成的。
表示在…情况，故选A.3．________ being famous might sound like a dream come true, today’s star, feeling like zoo animals, face pressures that few of us can imagine.A．If B．Since C．Until D．Although【答案】D【解析】考查状语从句。
A. If如果；B. Since既然；C. Until直到……为止；D. Although尽管。
句意：虽然成名可能听起来像是梦想成真，但今天的明星，就像动物园里的动物一样，面临着我们几乎无法想象的压力。
此处用Although引导让步状语从句，表示“尽管”。
4．Some pressure is good for you ________ it can help you try harder.A．unless B．althoughC．before D．as【答案】D【解析】考查连词。
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．Twenty students want to attend the class that aims to teach to read first.A．what B．who C．how D．why【答案】C【解析】2．_______ your opinions are worth considering, the committee finds it unwise to place too much importance on them.A．As B．Since C．Once D．While【答案】D【解析】While尽管，在本题中引导让步状语从句。
尽管你的观点值得考虑，委员会发现过于重视它们是不明智的。
3．The newly-married couple quarreled so much that they reached the point _______ they had to separate from each other.A．when B．where C．which D．that【答案】B【解析】定语从句考查题。
先行词是the point为抽象的地点，关系词where在从句中做状语。
句意为“这对新夫妇吵得如此厉害以至于到了不得不分手的地步” 选B4．_____ astronauts cannot go to a baseball game or a movie in space, there are many familiar activities that they can still enjoy.A．Once B．Unless C．While D．Since【答案】C【解析】while在此句中作为连词，表让步，意思是“虽然，尽管”。
句意：在太空中，宇航员们虽然不能去看棒球比赛或看电影，但那里还有很多相类似的活动他们仍然是可以玩的。
高二英语连词连接词试题答案及解析
高二英语连词连接词试题答案及解析1.I’ve been away for only three years, _____ I can hardly recognize my hometownA．so B．or C．for D．yet【答案】D【解析】考查连词辨析。
A. so因此；B. or否则；C. for因为；D. yet然而；句意：虽然我离开家乡只有三年然而我几乎认不出我的家乡。
两句之间是转折关系，故选D项。
考点 : 考查连词辨析2. The new policy allows a couple to have a second birth _____either is an only child.A．though B．if C．unless D．until【答案】B【解析】句意：新政策允许一对夫妇生二胎，如果其中有一人是独生子女的话。
这里用if引导条件状语从句，A. though虽然，引导让步状语从句，C. unless除非，如果不，引导条件状语从句，until直到，引导时间状语从句，所以选B。
【考点】考查连词3. Do you believe _____ true ______ you find high wages, you generally find high prices? A．that; that B．that; that whatC．it; when D．it; that where【答案】D【解析】考查宾语从句。
句意：得到丰厚薪水的工作，同时也需要付出很高的代价，你认为这是真的吗？当宾语从句过长时，常用it作形式宾语，把真正的宾语从句放在句子的最后。
believe it true that...相信......是真的；宾语从句包含一个地点状语从句，故选D。
【考点】考查宾语从句4. We were playing near the lake______ the storm started.A．while B．when C．until D．before【答案】B【解析】句意：我们在湖边玩的时候，这时风暴起来了。
高中连词练习题(附答案)
高中连词练习题(附答案)一、从属连词1．________ 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 2．--- It is five years ____I saw you last.--- Yes, and what a pity it is since it will be several years ____we see each other again. A．before; since B．when; when C．since; before D．when; then3．I am concerned, the strengths mentioned above exceed the weaknesses.A．As long as B．As far as C．As well as D．So long as4．_______ online shopping has changed our life, not all of its effects have been positive. A．While B．Because C．If D．Once5．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．which 6．—Some Chinese students find it difficult to understand native speakers when in London.—Exactly, _________ they’ve learned a lot about grammar and known many words.A．if only B．now that C．as if D．even if7．We all need to get involved in saving energy ________ it's at work, at home, or at school. A．unless B．once C．whether D．because8．It was evening ________ we reached the little town of Winchester.A．that B．until C．since D．before9．All people, ________ they are old or young, rich or poor, _________ their best to help those in need since the disaster.A．even if; tried B．no matter; have been trying C．whether; have been trying D．whether; tried10．Tom came late for the meeting. That was ______ he was ill.A．why B．because C．when D．how11．I won’t believe you______ I have seen it with my own eyes.A．while B．until C．after D．when12．________ focusing on what you lack, try noticing what you have. You may gradually feel better.A．More than B．Other than C．Rather than D．Less than13．It is ten years ________ the announcement of the first version of the human genome. A．since B．before C．after D．when14．-Why was William absent today?-That was________ he broke her leg in the basketball match.A．why B．because C．that D．/15．—How do you like the concert given by the “Foxy Ladies”?— Excit ing, ________ one piece of the music wasn’t played quite well.A．so B．though C．because D．and16．--Did your brother come back early last night?--Yes. It was not yet eight o’clock ________ he arrived homeA．when B．before C．that D．until17．________you want me to fire you, I suggest you stop wearing sports clothes at office.A．If B．Since C．Unless D．Until18．The shepherd and his dog set out early in the morning ________they could drive the flock of sheep to the valley before the noon.A．because B．before C．so that D．while19．—I think the environment is terrible these years.—Yes, it will be even worse________ the government takes action ________ it.A．until; protect B．unless; to protect C．if; protecting D．unless; protecting 20．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．unless二、并列连词21．—How does your mother like your presents for Mother’s Day?—Well, this sweater that one is fit for her. They’re too big.A．both; and B．either; orC．neither; nor D．not only; but also22．【2018·江苏97校联考】Parents should be aware of the fact that children, who are raised on a diet of soap operas and online games, seldom, participate in a variety of activities. A．if never B．if notC．if ever D．if so23．__________ he has been so rude to us, I feel like we have to punish him or he won’t respect us.A．Although B．UnlessC．If D．Now that24．The book is now out of print, ______ it can easily be borrowed from libraries.A．and B．forC．so D．but25．It’s seemingly unfair that girls can change into skirts during the hot weather ___________ boys have to swelter in long trousers.A．since B．whileC．when D．as26．Mr. Johnson, please give me a chance, I promise I’ll give you a wonderful surprise. A．then B．or C．and D．when 27．Detective Sam Peterson told the journalists ________ they hadn’t dismissed the idea that Justin was taken away by the aliens, they were looking into other possibilities.A．when B．whileC．unless D．until28．Calm down. It won’t be long I tell you the good result.A．since B．afterC．when D．before29．The artist was born poor, poor he remained all his life.A．and B．or C．but D．so30．In order to promote the new product, the advertiser spared _______ energy _______ money to make huge billboards（广告牌）.A．neither ... nor B．either ... or C．not only ... but also D．not ... but 31．We did not know you were in trouble at that time, ______we would have given you a hand. A．otherwise B．howeverC．therefore D．though32．Actually, our hobbies vary a lot—I like outdoor activities, _________ square dance is my wife’s preference.A．although B．when C．while D．as 33．Schools in the north tend to be better equipped, _______those in the south are relatively poor.A．as B．since C．while D．because34．Do your best, ________ you will succeed.A．or B．and C．/ D．but35．I thought we’d be late for the concert, ______ we ended up getting there ahead of time. A．but B．or C．so D．for 36．Notices in the waiting room requested that you can neither smoke ________ shout loudly. A．and B．or C．so D．nor37．I was about to go back to sleep I heard a strange noise.A．while B．as C．when D．then 38．Which one of the following sentences is the compound sentence(并列句)?A．Playing football and dancing are his favourites.B．The good news is that this stormy period will not last.C．You feel ready to be more responsible and make decisions on your own.D．I don’t know what “home” is, but unhappiness and worries melt away once there. 39．Walk along this road for 100 meters ________ you’ll s ee the hospital.A．or B．otherwise C．and D．or else 40．24. Too much stress does you harm ________no stress makes you achieve little.A．or B．because C．since D．while【参考答案】一、从属连词1．D【解析】【详解】考查状语从句和动词短语辨析。
高中连词练习题(含答案)
高中连词练习题(含答案)一、从属连词1．My bike was broken yesterday,________I had to walk to school.A．or B．so C．but D．because 2．David still works hard ________ he has made great progress.A．because B．though C．unless D．if3．I don’t believe we’ve met before, ________I must say you do look familiar.A．given that B．although C．since D．unless4．I would like to arrive 20 minutes earlier _____ I can have time for a cup of tea.A．as a result B．as soon as C．in case D．so that5．________ he passed away in 1961, Mei Lanfang had been performing and encouraging the spread of Peking Opera for almost 60 years.A．Once B．As C．Until D．Since6．________ 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．Unless7．I just sat by the window watching the passing scene ________ I caught the eye of a waiter and ordered my meal.A．once B．while C．until D．since8．Tom came late for the meeting. That was ______ he was ill.A．why B．because C．when D．how9．All people, ________ they are old or young, rich or poor, _________ their best to help those in need since the disaster.A．even if; tried B．no matter; have been trying C．whether; have been trying D．whether; tried10．We’ve been friends________we came to this school a year ago.A．when B．for C．before D．since11．______ you work hard, you will certainly succeed.A．Though B．If C．Because D．For12．We won’t get good grades in P. E ________ we keep exercising every day.A．if B．because C．unless D．since13．Dr. Zhong advised the public not to go to the crowded places ________ they should be infected with Covid-19.A．even if B．in case C．as long as D．now that14．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 threaten their chances for survival.A．until B．unless C．whether D．when15．That’s ________when the stars are out, they are visible, but when the lights are out, they are invisible.A．how B．because C．why D．that16．“________, 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 times17．If the country is fully employed, its boom industries cannot grow ______ other industries shrink.A．if B．unless C．lest D．for18．As the day was fine, I made the suggestion ________ for a walk in the park.A．we go B．we will go C．we should go D．that we go19．I won’t believe you______ I have seen it with my own eyes.A．while B．until C．after D．when20．________ 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．As二、并列连词21．He doesn’t mind. __________, he’s pleased.A．As a matter of fact B．However C．Or D．But22．It looked like rain. , it is clear this morning.A．While B．ButC．However D．So23．“________ many people say that life is the art of living, I believe that life is the art of drawing without an eraser,” said Christine, CEO of the Greater China division fr om a bank in Singapore.A．Once B．Since C．While D．If 24．—Monica, someone wants you on the phone!—_____ nobody knows I’m in Beijing.A．Or B．SoC．And D．But25．The mother saw her baby fall to the ground, ________ brought her heart to her mouth. A．it B．and that C．and which D．that26．In order to promote the new product, the advertiser spared _______ energy _______ money to make huge billboards（广告牌）.A．neither ... nor B．either ... or C．not only ... but also D．not ... but 27．The sun is bigger than the moon , ___ we all know it.A．and B．as C．which D．it28．Don’t use your mobile phone while charging, ______ you may be shocked by electricity. A．or B．and C．but D．yet29．Looking back upon my teaching career, I don’t remember ever having been doubted, or challenged in class, ________ rejected.A．other than B．let aloneC．rather than D．more than30．I bought a new shirt for John, _____ he didn’t like it.A．becuase B．and C．but31．It takes three hours to get to the post office, route you make.A．whichever B．anyC．however D．wherever32．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 if33．You need to pay your bill immediately， ________ your water and electricity will be cut off. A．or rather B．or else C．even so D．if so34．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 35．—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 36．Jack, I’m sorry to trouble you, ______ could I ask you a question?A．so B．or C．and D．but37．The young man tried to stop, ________he drove too fast to stop.A．and B．but C．so D．or38．Mrs. Smith was cooking breakfast in the kitchen ________ she heard a loud knock at the door.A．before B．since C．when D．while39．________ Chinese ________ Japanese are Asians.A．Both；and B．Neither；nor C．Neither；or D．Either；or 40．Some people say more but do less ________ others do the opposite.A．as B．when C．while D．because【参考答案】一、从属连词1．B【解析】【详解】考查连词。
高中连词练习题(及答案)
高中连词练习题(及答案)一、从属连词1．-Why was William absent today?-That was________ he broke her leg in the basketball match.A．why B．because C．that D．/ 2．Importantly, ________ the method of translation, the spirit of the original work cannot be lost.A．no matter how B．no matter what C．no matter when D．no matter where 3．You’d better write the book in simple English_____ the children aged 10-12 can read and understand it easily.A．now that B．so that C．as if D．even if4．You will never achieve success _______ you keep working hard.A．when B．if C．unless D．because5．It was evening ________ we reached the little town of Winchester.A．that B．until C．since D．before6．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．_______ a lot of hard work and a touch of luck play a part, perseverance is the key to success. A．However B．When C．Whether D．While 10．Please keep an eye on the stove ________ the milk boils.A．in memory of B．so that C．in case D．apart from 11．The meeting didn’t start______ everyone was there.A．because B．until C．why D．if12．We will visit the Olympic Village ________ it rains tomorrow.A．unless B．as soon as C．when D．since13．You’d better conduct the experime nt ________ your professor have instructed you; otherwise you may fail to complete it.A．that B．which C．as D．when14．________ other companies still kept integrating fingerprint readers, Apple threw that out and made facial recognition work.A．Once B．While C．Unless D．Since15．The shepherd and his dog set out early in the morning ________they could drive the flock of sheep to the valley before the noon.A．because B．before C．so that D．while16．The family members were discussing where to take a trip during the wintervacation ________a tourist agent turned up at the house.A．when B．while C．even if D．though17．______ 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．My boss is waiting for the report, so I can’t leave here ______ I finish it.A．since B．until C．though D．if19．___________I explained on the phone, I will go with you to the park next Sunday.A．That B．Which C．As D．When20．________ 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．A better future is the goal of the Chinese people, it’s also the common inter est of the world.A．so B．and C．or D．but 22．—Monica, someone wants you on the phone!—_____ nobody knows I’m in Beijing.A．Or B．SoC．And D．But23．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; before24．The largest collection ever found in England was one of about 200,000 silver pennies, and ______ were over 600 years old.A．all of them B．all of whichC．all of whom D．they all25．What he said was heartbroken. I felt _____________ a knife were sticking into my heart. A．even if B．as ifC．as D．as well26．Some people like living in the big city, ___________ others prefer living in the countryside. A．when B．whichC．where D．while27．You are not polite enough, When you serve customers, you don’t turn your head ________ your body towards them.A．either B．orC．not D．neither28．24. Too much stress does you harm ________no stress makes you achieve little.A．or B．because C．since D．while 29．People in Chongqing are proud of they have achieved in the past ten years.A．that B．whichC．what D．how30．Bai women wear white and red costumes, _______ the men wear white shirts and long wide trousers.A．while B．but C．because D．so31．We thought there were 35 students in the lecture hall, ___________, in fact, there were 40. A．while B．whetherC．what D．which32．There is no way of knowing why one man has a good mood ____ another man, also optimistic, fails.A．thus B．and C．but D．while33．Mr Johnson sang so well that everyone said he was ________ a singer ________ a teacher. A．both … and B．not only … but also C．either … or D．more … than 34．Tom is a quiet student in class, _______________ he is quite active in outdoor activities. A．so B．and C．because D．but35．Work hard, ________ you will succeed sooner or later.A．and B．but C．also36．Are you here for the activity of making, buying or selling things for money ________ pleasure?A．and B．or C．but D．for37．Either Bill or you ________ on duty yesterday morning.A．is B．are C．was D．were 38．According to a report released recently, the major cause of air pollution in Beijing is vehicle emissions (汽车尾气排放)________ in Shanghai the biggest problem is dust and heavy industry. A．as B．while C．although D．where39．— Someone wants you on the phone.— ________ nobody knows I am here.A．Although B．AndC．So D．But40．It turned out that this material was neither silk ________cotton.A．or B．nor C．not D．no【参考答案】一、从属连词1．B【解析】【详解】考查从属连词。
高考连词专项练习及答案详解
6．He missed the worst of the traffic this morning, he set out before 6 oclock.高考连词专项练习及答案详解一、单项选择连词1． I have no idea ____ the journalist could have got his information from.A ． thatB ． whyC ．whyD ．where 【答案】 D 【解析】句意：我不知道这位记者是从哪里得到的消息。
根据句意应选 D 。
2． The photo brought me back to the memory of the time in Qingdao, ___ I spent my summer holiday by the seaside with my friends.A ． thatB ．whenC ． whichD ． what【答案】 B【解析】考查定语从句。
先行词是 the time ，在定从 ____ I spent my summer holiday by the seaside with my friends. 中作时间状语。
所以选 B 。
3． I missed supper _____ I ' m starving!试题分析：句意：我没吃晚饭，现在我快要饿死了！由句意可知，空格处应该是缺少表示 递进的连词， but 表转折， or 表选择， for 表原因，只有 and 表递进，故选 B 。
考点 : 考查连词的用法。
4． I had hardly opened the door he hit me.D ．until答案】 BHardly ⋯ when 刚一。
就；我国一打开门，他就打中了 5． _____ unemployment and crime are high, it can be assumed that the latter is due to the former.A ． WhereB ．BeforeC ． UntilD ． Unless【答案】 A【解析】考查连词。
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高中英语连词经典习题(含答案)一、单项选择连词1．_______some people some here for a short break , others have decided to stay forever.A．Because B．If C．Once D．While【答案】D【解析】2．To live in honor, he came from a poor family, was his ambition.A．though B．if C．unless D．however【答案】A【解析】though尽管if如果;是否unless除非however无论怎样,根据题意他的野心就是为了有尊严的活着,尽管他来自一个贫穷的家庭.故选A.3．_____ astronauts cannot go to a baseball game or a movie in space, there are many familiar activities that they can still enjoy.A．Once B．Unless C．While D．Since【答案】C【解析】while在此句中作为连词，表让步，意思是“虽然，尽管”。
句意：在太空中，宇航员们虽然不能去看棒球比赛或看电影，但那里还有很多相类似的活动他们仍然是可以玩的。
考点：连词／连接词4．We need to master this technology immediately，______ we will fall behind．A．but B．or C．so D．and【答案】B【解析】本题考查连词的用法，but但是;or或者，否则;so 所以，因此;and而且。
根据句意，可知选B。
句意：我们需要马上掌握这门技术，否则我们就要落后。
5．I missed supper_______ I’m starving!A．but B．and C．or D．for【答案】B【解析】试题分析：句意：我没吃晚饭，现在我快要饿死了！由句意可知，空格处应该是缺少表示递进的连词，but表转折，or表选择，for表原因，只有and表递进，故选B。
考点: 考查连词的用法。
6．Things don’t always go as planned, ________ I sti ll stay positive.A．or B．as C．but D．for【答案】C【解析】试题分析：考查并列连词。
句意：事情并不总是按着计划进行，但是我仍然保持积极。
故选C。
考点：考查并列连词7．I usually sleep with the window open ________ it is really cold.A．if B．unless C．now that D．in case【答案】B【解析】试题分析：考查连词辨析。
A. if如果；B. unless除非；C. now that既然；D. in case万一。
句意：我通常开着窗户睡觉，除非天气真的很冷。
故选B。
考点：考查连词辨析8．Don’t give up regardless of difficulty and failure, ________ you’ll never achieve your goals. A．and B．but C．or D．so【答案】C【解析】【详解】考查固定句型。
句意：不管困难和失败，别放弃，否则你就不能实现你的目标。
祈使句+and（然后）/or/otherwise（否则）+陈述句，注意后面的陈述句通常是一般将来时。
答案选C。
9．______ you fully understand the instructions of the experiment, your life won’t be secured. A．Unless B．If C．Once D．When【答案】A【解析】考查连词辨析。
A. Unless除非；B. If如果；C. Once一旦；D. When当……时候。
句意：除非你完全理解实验的指导，否则你的生命将无法得到保障。
表达的是“除非”的意思，故选A。
10．Huawei Mate 10 is a big beautiful phone, _______ it’s a little expensive.A．for B．orC．but D．so【答案】C【解析】考查连词。
句意：华为Mate 10是一款非常漂亮的手机，但是有点贵。
前后句意思转折，用but，故选C。
11．He missed the worst of the traffic this morning, ______ he set o ut before 6 o’clock.A．but B．soC．for D．or【答案】C【解析】考查连词。
句意：他避开了今天早上的高峰拥堵，因为他六点前就出发了。
A. but 但是；B. so因此；C. for因为；D. or否则。
根据语境判断后句表示原因，故选C。
12．All of our equipment dates back to the 1960s and 1970s; we cannot make products that compete with foreign products, we can buy the necessary technology.A．unless B．whileC．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。
13．The villagers have already known ___________ we’ll do is to rebuild the bridge.A．this B．thatC．what D．which【答案】C【解析】试题分析：通过分析句子结构，可知这个句子中包含一个宾语从句，且引导词在从句中作宾语，表示什么的意思，故用what。
考点：宾语从句的考查点评：在句子中起宾语作用的从句叫做宾语从句。
宾语从句分为三类:动词的宾语从句,介词的宾语从句和形容词的宾语从句。
解答这类题，首先要确定从句是什么从句，然后依据相应的语法规则答题。
宾语从句中引导词的确定，要看它在宾语从句中作什么成分，有没有什么实际意义。
14．_______ your opinions are worth considering, the committee finds it unwise to place too much importance on them.A．As B．Since C．Once D．While【答案】D【解析】While尽管，在本题中引导让步状语从句。
尽管你的观点值得考虑，委员会发现过于重视它们是不明智的。
15．________ the sales figure of the new range of products is relatively small, the potential market is large.A．Unless B．After C．Since D．While【答案】D【解析】【详解】考查让步状语从句。
句意：尽管新系列产品的销售数字相对较小，但潜在市场很大。
A. Unless除非；B. After在……之后；C. Since自从，既然；D. While虽然。
根据句意可知，此处是让步状语从句，while用在句首，引导让步状语从句。
故选D。
16．Why are some brands more popular than others ______ the products are of similar quality? A．as though B．even if C．so that D．in case【答案】B【解析】【详解】考查让步状语从句。
句意：为什么即使产品很相似，一些品牌却比其他的更流行呢？A. as though好像；B. even if 即使，虽然；C. so that因此；D. in case 以防，万一。
故B选项正确。
17．The little boy won’t go to sleep ________ his mother tells him a story.A．or B．unless C．but D．whether【答案】B【解析】试题分析：这题考查连词：A项.or conj.或，或者；还是；不然，否则；左右，B.项unless conj.除非，如果不="if" not，C项.but conj.但是；而是；除了；只因为，D项whether conj1. 是否2. 不管…(还是…)习惯用语whether or not，句意是：小男孩不愿睡觉，除非妈妈给他讲故事。
选B。
考点：考查连词点评：对于连词，要注意上下文的意思，弄清逻辑关系。
选用适当的连词。
18．Viewers continue to watch TV ______ they complain about the quality of the programming.A．even though B．as if C．as long as D．unless【答案】A【解析】考查连词。
even though尽管，即使；as if好像；as long as只要；unless除非。
句意：观众继续看电视，尽管他们抱怨节目的质量。
19．I was glad to meet Jenny again, _______ I didn’t want to spend all day with her．A．but B．and C．so D．or【答案】A【解析】本题考查连词。
句意：我很高兴再次见到Jenny，但是我不想整天都和她呆在一起。
but：但是，表示转折关系；and：并且，表示并列关系；so：所以，表示因果关系；or：或者，否则，表示选择关系。
选A。
考点：连词／连接词20．You can’t borrow books from the school library ______ you get your student card. A．before B．ifC．while D．as【答案】A【解析】【详解】考查连词辨析。
句意：在你得到你的学生卡之前你不能从学校图书馆借书。