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,引導賓語從句,句中有tomorrow,用一般將來時態(tài),第二空中if引導條件狀語從句意為“假如”,主句用將來時從句用一般現(xiàn)在時表示將來,故選C 。考點:考查動詞的時態(tài)。12.Now most families have only one child _____ our country’s onechild policy.A.so B.because C.because for D.because of【答案】D【解析】【詳解】句意:由于我們國家的獨生子女政策,現(xiàn)在大多數(shù)家庭只有一個孩子。so 所以;because 因為,引導原因狀語從句;because for 不符合英語表達習慣;because of因為,由于,后面不能加句子,只能加詞或短語, 所以選D。13.Chen Wei isn’t at school today ________ he is taking a robot petition in Shanghai.A.so B.because C.before D.if【答案】B【解析】試題分析:句意:陳煒今天不在學校因為他在上海參加機器人競賽。so所以;because因為;before在……之前;if如果。所以選B??键c:考查連詞。14.Tony has had to cook by himself ________ his mother went on business to Guangzhou.A.since B.a(chǎn)fter C.during D.when【答案】A【解析】【詳解】句意:自從媽媽去廣州出差以來,托尼不得不自己做飯。A. since從……以來;B. after在……之后;C. during 在……期間;D. when當……時候。since后跟時間狀語從句時,表示的是到目前為止的時間段,從句時態(tài)為一般過去時,而主句的時態(tài)為現(xiàn)在完成時,故正確答案為A。15.I enjoy fresh air so always sleep with the window open ______ it is really cold.A.unless B.when C.if D.Since【答案】A【解析】【分析】【詳解】句意:我喜歡新鮮空氣,因此我總是讓窗戶開著,除非真的很冷??疾檫B詞辨析。A.Unless除非,相當于if not,表條件;B.When當……的時候;C.If如果,表條件;D.Since自從。根據(jù)I enjoy fresh air so always sleep with the window open 可知除非真的很冷否則總是讓窗戶開著,unless符合題意,故選A。16.Cathy is afraid of the dog. She will run away _______she sees it.A.ever since B.a(chǎn)lthough C.a(chǎn)s soon as D.so that【答案】C【解析】【詳解】句意:凱西害怕狗,她一看到狗就跑了??疾檫B詞辨析。A. ever since自從;B. although雖然、盡管;C. as soon as一…就;D. so that以便;所以。根據(jù)Cathy is afraid of the dog. 凱西害怕狗,可推知是她一看到狗就跑開了,結合選項可知C選項符合題意,故答案選C。17.Did you call Sara back ? I didn’t need to ,_____ we’ll have a meeting together tonight.A.though . B.unless C.because D.if【答案】C【解析】【詳解】句意:——你給薩拉回電話了嗎?——我不需要給薩拉回電話,因為我們今晚一起有個會議??疾檫B詞辨析。though雖然,盡管;unless除非;because因為;if是否,如果。根據(jù)句意可知