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。D.when【答案】 D 21.They waited ____ it was dark before leaving, ____ they didn39。t want anyone to see them leave. A.since。 becauseB.until。 asC.unless。 butD.so。 because【答案】 B 22.____it rained a lot, we enjoyed our holiday. A.AlthoughB.BecauseC.UnlessD.However【答案】 A 23.—Why do many kids spend more time playing puter games? —Because their parents are _____ busy _____ they have little time to stay with their children. A.too, toB.so, thatC.such, thatD.enough, to【答案】 B 24.___________ you know the answer, please ___________ your hand. A.If。 raiseB.If。 riseC.Unless。 raiseD.Unless。 rise【答案】 A 25.Yesterday morning I was just leaving the telephone rang. A.whenB.whileC.becauseD.since【答案】 A 26.I never doubt _______ this park is worth _______. A.whether, visitingB.that, a visitC.that, travellingD.whether, travel【答案】 B 【解析】【分析】句意:我從不懷疑這個公園值得參觀。doubt 懷疑,never doubt從不懷疑,就是肯定,后面賓語從句是陳述句,所以用that引導,根據(jù)常識可知這個公園值得參觀,而不是值得旅游,be worth+名詞,表示.......值得,故選B。 【點評】考查賓語從句。掌握賓語從句的引導詞的使用。注意固定短語be worth+名詞的使用。27.He doesn39。t feel ___________, ___________ he has to see a doctor. A.good enough: butB.well enough。 butC.good enough。 soD.well enough。 so【答案】 D 【解析】【分析】句意: 他覺得不舒服,所以他必須去看醫(yī)生。根據(jù)他必須去看醫(yī)生,可知是身體不舒服,well,是形容詞舒服的,good,好的,不舒服和看醫(yī)生是因果關系,故是連詞so,所以 , 故選D。 【點評】考查形容詞辨析,注意連詞so的用法。28.What shall we do___________ it rains tomorrow? A.ifB.whileC.sinceD.and【答案】 A 【解析】【分析】句意: 如果明天下雨,我們該怎么辦?;……時候;;。根據(jù)前后句句意可知,此處應該是if引導的條件狀語從句,時態(tài)根據(jù)主將從現(xiàn)原則,故選A。 【點評】考查連詞辨析。注意if引導的條件狀語從句,時態(tài)根據(jù)主將從現(xiàn)原則。29.Scientists say we will have no water to drink__________ we protect water resources. A.ifB.whenC.beforeD.unless【答案】 D 【解析】【分析】句意:科學家說,除非我們保護水資源,否則我們將沒有水喝。;......時候;......之前;......否則。除非保護水資源,否則我們沒有水喝,所以用unless,故選D。 【點評】考查連詞辨析,首先識記連詞詞義,然后根據(jù)句意確定。30.The writer walked slowly ______________ his bad leg. A.becauseB.sinceC.asD.because of【答案】 D 【解析】【分析】句意:那位作家因為腿不好走得慢。because、since和as都有因為的意思,都是連詞,后面接句子;because of因為,介詞短語,后面不加句子。his bad leg不是句子,所以用because of。 【點評】考查連詞辨析和短語辨析,注意平時識記because、since、as和because of的區(qū)別。31.— What were you and your father doing at 7:00 yesterday evening? — I was doing my homework _______________ my father was reading newspapers.A.whenB.as soon asC.while【答案】 C 【解析】【分析】句意:——昨天晚上7點你和你爸爸在干什么?——我爸爸在看書的時候我正在做家庭作業(yè)。……時候;…就…;……時候。此處表示“讀書”和“做作業(yè)”兩個動作同時發(fā)生,故排除B,when引導時間狀語從句,主句用過去進行時,從句常用一般過去時,而while當……時候,引導時間狀語從句時,謂語動詞為持續(xù)性動詞,且常和進行時連用,故選C。 【點評】考查連詞辨析。注意識記while的詞義和用法。32.— Your father has passed the driving test? — Yes. _______________ my father _______________ my mother has.A.Not only。 but also