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的狀語從句時,表示“以便;為了”,從句中常使用can /could /may /might /will /would /should等情態(tài)動詞或助動詞,因此選A。B. because 意為“因為”;C. since 表示“自……以來,因為,由于”;D. when 意為“當……時”。老師大聲說話的目的是讓學生們都聽到,所以,B、C、D均不符合題意。42.When you are in your school dining hall during lunchtime, you may feel lonely _______ you can find someone to have lunch with.A.if B.unlessC.a(chǎn)fter D.because【答案】B【解析】【分析】【詳解】句意:當你在學校食堂吃午飯的時候,你可能會感到孤獨,除非你能找個人一起吃午飯。考查連詞用法辨析。if如果,unless除非,都表條件;after表時間,because表原因。本句前后句是條件關系,可排除CD兩項。根據(jù)句意可知if不合句意,故選B。43.It was the middle of the night _____the sound of the piano woke me up.A.because B.if C.when D.a(chǎn)lthough【答案】C【解析】【詳解】句意:正是半夜鋼琴聲把我吵醒了。A. because因為;B. if如果;C. when 當……的時候;D. although盡管,雖然。根據(jù)下文the sound of the piano woke me 。根據(jù)題意,故選C。44.He didn’t go to school yesterday _______ he was ill.A.because B.because of C.if D.so【答案】A【解析】【詳解】句意:他昨天沒去上學,因為他病了。本題的含義是昨天他沒有去上學,“他病了”應該是他沒上學的原因,because后跟原因從句,because of后跟單詞或短語,if如果后接條件狀語從句,so因此。故選A。45. Can students go online during lessons? They can ________ it is for that lesson.A.ifB.orC.soD.but【答案】A【解析】句意:——學生可以在課上上網(wǎng)嗎?——如果是為了上課,他們可以上網(wǎng)??疾檫B詞辨析題。if如果,表條件;or或者,表選擇;so所以,表結(jié)果;but但是,表轉(zhuǎn)折。答句是條件狀語從句,需用if連接。根據(jù)句意結(jié)構,可知選A。46.- What’s your opinion about friends?- They are like books. We don’t need a lot of them they’re good.A.a(chǎn)s long as B.a(chǎn)s soon as C.so that D.a(chǎn)s if【答案】A【解析】【詳解】句意“關于朋友,你的觀點是什么?他們像書,只要他們好,我們不需要太多”。(引導條件狀語從句);……就……(引導時間狀語從句);,為的是(引導目的狀語從句);(引導方式狀語從句)。根據(jù)句意可知,譯為“只要他們好”,引導條件狀語從句,故選A。47.She stopped talking her mother came into the room.A.a(chǎn)s soon as B.unless C.though【答案】A【解析】句意:她媽媽一進到房間里,她就停止了說話。A. as soon as 一就; B. unless 除非; C. though盡管;這里是考察連詞,根據(jù)She stopped talking 和her mother came into the ,可知是媽媽一進到房間里,她就停止了說話;故選A48.—Betty, do you know if Tony ______ the photo petition?—He will, if he ______ his project on Australia.A.enters。 finishes B.enters。 will finishC.will enter。 finishes D.will enter。 will finish【答案】C【解析】【詳解】句意:貝蒂,你知道托尼是否要參加攝影比賽?他會的,如果他完成了有關澳大利亞的課題。問句中if引導的是賓語從句,翻譯為是否,前者問的是將來;答語是由if引導的條件狀語從句,所以遵循主將從現(xiàn)的原則,所以if之后用一般現(xiàn)在時。所以答案選C。49.If the singer ______ to Zigong ______ September 20th, please call me.A.will get;on B.gets;onC.gets;in【答案】B【解析】【詳解】句意:如果歌手9月20日到自貢,請給我打電話。if引導的條件狀語,時態(tài)要滿足“主祈從現(xiàn)”,所以第一空是一般現(xiàn)在時態(tài),主語單數(shù),謂語動詞變第三人稱單數(shù)用gets;表示具體某一天用介詞on。In用在一天中的上午,下午或晚上,用在季節(jié),月份。根據(jù)題意,故選B。【點睛】if和unless引導的條件狀語從句主將從現(xiàn)常見的有以下幾種情況:一、條件狀語從句的主句是一般將來時,那么從句常常用一般現(xiàn)在時如:When I grow up,I’ll be a nurse and look after patients我長大后要當一名護士,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)在時如:Don’t laugh at me when I make a mistake.我犯錯誤的時候不要笑話我.三、如果主句是含有情態(tài)動詞的一般現(xiàn)在時,根據(jù)需要從句多用現(xiàn)在進行時如:You should be quiet when you are in the reading room在閱覽室時應保持安靜50.—Jack, remember ______ off the lights when _______your bedroom.OK, I won’t forget, Mom.A.turning。 leaving B.to turn。 leave C.turning。 left D.to turn。 leaving【答案】D【解析】【詳解】句意:——杰克,記得離開臥室時把燈關掉?!冒?,媽媽,我不會忘記的??疾榉侵^語動詞。上一句句意:杰克,離開臥室時記得關燈。remember to do (未做);remember doing (已做)。when doing 。故選D。