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這里是since引導的時間狀語從句,主句用現(xiàn)在完成時態(tài),從句用一般過去時態(tài),其他不符合題意,故選C。之前 C. since自從 D. while當30.Our teachers have been with us for nearly three years we came to junior high school. We should thank them for what they have done for us.A.until B.before C.since D.while【答案】C【解析】句意:自從我們來到初中,我們的老師們已經(jīng)和我們在一起將近三年了,我們應該感謝他們?yōu)槲覀兯龅囊磺小?9.(題文)— Did you win the game yesterday?— Not really. ______we all tried our best, we lost it.A.If B.Though C.Unless【答案】B【解析】試題分析:句意:你昨天贏了比賽了嗎?沒有,我們都盡了最大努力,但是還是輸了比賽。s happening in the world.A.so that B.ever since C.a(chǎn)s soon as D.even though【答案】A【解析】句意: 許多人喜歡看報,以便他們能了解世界上正在發(fā)生的事情。27.I’m going to take him to some famous hutongs _____ he can learn more about China.A.because B.when C.so that D.a(chǎn)s if【答案】C【解析】試題分析:句意:我?guī)ヒ恍┯忻暮瑸榱俗屗嗟牧私庵袊?。如果人們不停止殺害熊貓,形勢不會改變?5.Martin and his friends didn’t eat up all the food they ordered, __ they took the rest away.A.for B.or C.so D.a(chǎn)s【答案】C【解析】【詳解】本題考查連詞的使用和區(qū)別??疾楣潭ńY構。 to B.enough。A. before在……之前,引導時間狀語從句;B. if 如果,引導條件狀語從句;C. though 盡管,雖然,引導讓步狀語從句;D. until直到……引導時間狀語從句。22.—I’m busy with my schoolwork these days.—That’s great! You won’t get good grades ______ you work hard.A.if B.becauseC.unless D.a(chǎn)fter【答案】C【解析】試題分析:句意:這些天我忙著學校工作。 will stay【答案】D【解析】【詳解】句意:——你明天將去爬山嗎?——是的。21.—Are you going to climb the mountains tomorrow?—Yes. But if it _____, I_____ at home.A.will rain。另外such …that…也是引導的結果狀語從句,such后面跟名詞,如:This is such an interesting book that everyone wants to read it.20.Some children prefer to eat sweet chocolate _____ it’s not good for their health.A.because B.if C.when D.though【答案】D【解析】【詳解】句意:有些孩子喜歡吃甜巧克力,雖然這對他們的健康不好。如:1) This book is so interesting that everyone wants to read it. 這本書很有趣,人人都想看看。too+形容詞或副詞+to+動詞原形,意思是“太……而不能”;such...that...和so...that...意思都是“如此……以至于……”,such后接名詞,so后接形容詞或副詞,that后接從句。 that D.a(chǎn)s。通過分析主從句之間的邏輯關系可知應該選擇引導條件狀語從句的從屬連詞if或unless,再根據(jù)句子所表達的含義“如果不早點睡,明