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B。21.(題文)I’m sure that you will succeed in the end ___________ you give up halfway.A.until B.till C.unless D.a(chǎn)lthough【答案】C【解析】試題分析:句意:如果你不半途放棄,我肯定你最終會(huì)成功的。A. until直到,表示時(shí)間;B. till 直到,表示時(shí)間;C. unless如果不,除非,表示條件;D. although雖然,盡管。表示讓步。如果不放棄,就會(huì)成功。故選C??键c(diǎn):考查連詞用法辨析。22. Lucy knew nothing about it _____ her sister told her.A.because B.until C.if D.since【答案】B【解析】試題分析:句意:露西直到她姐姐告訴她才知道這件事。Because因?yàn)椋?until直到; if如果; since自從。Notuntil直到才,是一個(gè)固定句型。所以選B??键c(diǎn):考查連詞。23. Can’t I park my car free here? You can, for four hours, __________ you spend over 100 yuan in this supermarket.A.though B.if C.unless【答案】B【解析】【詳解】句意:我不能把車免費(fèi)停在這里嗎? 如果你在這家超市花費(fèi)超過(guò)100元,你可以免費(fèi)停車四個(gè)小時(shí)。though 雖然;if 如果;unless 除非。這里是形容一種條件,如果消費(fèi)超過(guò)100元,就能免費(fèi)停車,故選B。24.You won39。t succeed _____ you work hardA.if B.because C.unless D.so that【答案】C【解析】【詳解】句意:你不會(huì)成功的,除非你努力工作。if如果;because 因?yàn)?,引?dǎo)原因狀語(yǔ)從句;unless如果不,除非;so that以至于,引導(dǎo)結(jié)果狀語(yǔ)從句;為的是,引導(dǎo)目的狀語(yǔ)從句。根據(jù)句意可知,這里表示“如果不努力工作”,故應(yīng)選C。25.We all know that we won39。t enjoy good health ______ we often exercise.A.though B.if C.when D.unless【答案】D【解析】【詳解】句意:我們都知道如果我們不經(jīng)常鍛煉,我們將不會(huì)享有好的健康??疾檫B詞的用法。A. though雖然,盡管;B. if如果;C. when當(dāng)......的時(shí)候;D. unless除非,如果不。根據(jù)句意:我們都知道如果我們不經(jīng)常鍛煉,我們將不會(huì)享有好的健康。只有D項(xiàng)符合題意。故選D?!军c(diǎn)睛】主將從現(xiàn)是指在時(shí)間狀語(yǔ)從句和條件狀語(yǔ)從句中,如果主句是一般將來(lái)時(shí),從句用一般現(xiàn)在時(shí)替代一般將來(lái)時(shí)。 常見(jiàn)的有以下四種情況:一、條件狀語(yǔ)從句的主句是一般將來(lái)時(shí),那么從句常常用一般現(xiàn)在時(shí) 如: When I grow up, I’ll be a nurse and look after patients 我長(zhǎng)大后要當(dāng)一名護(hù)士,照顧病人二、如果主句是祈使句,那么從句通常要用一般現(xiàn)在時(shí) 如:Don’t laugh at me when I make a mistake. 我犯錯(cuò)誤的時(shí)候不要笑話我。三、如果主句是含有情態(tài)動(dòng)詞的一般現(xiàn)在時(shí),根據(jù)需要從句多用一般現(xiàn)在時(shí) 如:You should be quiet when you are in the reading room 在閱覽室時(shí)應(yīng)保持安靜 四. 如果if的條件狀語(yǔ)從句遇到變換間接和直接時(shí) , 祈使句應(yīng)用not to.... 如。 She said not to close the window 常見(jiàn)的時(shí)間狀語(yǔ)從句的連詞有:as soon as,when,while ,as,until等。26.Today’s young people can’t live without smart phones. They keep their hands on the phones whenever they go, even while they_______meals.A.had B.will haveC.a(chǎn)re having D.were having【答案】C【解析】【詳解】句意:今天的年輕人沒(méi)有智能手機(jī)就活不下去。無(wú)論何時(shí)甚至在吃飯時(shí)他們都手里拿著手機(jī)。考查動(dòng)詞時(shí)態(tài)。while表示一段時(shí)間,后面使用進(jìn)行時(shí)態(tài),主句是一般現(xiàn)在時(shí),可知從句使用現(xiàn)在進(jìn)行時(shí);故答案C。27.一Xiao Lin,this desk is heavy I can39。t move it.一Don39。t 39。ll help you.A.such;that B.too;to C.so;that【答案】C【解析】【詳解】句意:— — 小林,這張桌子太重了,我動(dòng)不了。 — — 別擔(dān)心,我會(huì)幫你的。too....to....太....而不能....,to后面不能接句子,故排除選項(xiàng)B;so/such....that.....:太....以至于....,that后接句子;such+a(an)+adj.+單數(shù)可數(shù)名詞+that…;so+adj./adv.+that…;結(jié)合句子this desk is heavy I can39。t move it. 可知,其中心詞是形容詞heavy,因此用so....that.....句式,故選C。28.It has been much easier for me to go to work________ shared bikes appeared.But they also caused plenty of problems.A.since B.before C.unless D.though【答案】A【解析】句意:——自從共用自行車出現(xiàn)以來(lái),我就更容易去上班了?!鼈円苍斐闪撕芏鄦?wèn)題。考查連詞辨析題。A. since自從……,后接時(shí)間名詞或從句,表一段時(shí)間,用于現(xiàn)在完成時(shí);B. before在……以前,表時(shí)間;C. unless除非,表?xiàng)l件;D. though盡管,表讓步。本句是時(shí)間狀語(yǔ)從句,可排除CD兩項(xiàng)。根據(jù)句意結(jié)構(gòu)和語(yǔ)境,可知before不合句意,故選A。29.They didn39。t go to bed_____ the work was finished.A.when B.while C.until D.a(chǎn)fter【答案】C【解析】【詳解】句意:他們直到工作完成才睡覺(jué)??疾檫B詞。when當(dāng)……時(shí)候,可表示時(shí)間段或時(shí)間點(diǎn),一般主句使用過(guò)去進(jìn)行時(shí),從句使用一般過(guò)去時(shí);while當(dāng)……時(shí)候,而;until直到;after在……以后。短語(yǔ)“not… u