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tist you told me.A.until B.because C.since【答案】A【解析】句意:直到你告訴我,我才知道他是一位出名的科學家。A. until到…為止;B. because 因為;C. since既然,因為。本題考查固定句式not…until…直到……才。其用法是如果(主)句中的謂語是終止性動詞,應采用“not…until”結構,意為“到……時候才” 根據句子結構,結合選項,故選A。13.The nurse won39。t leave her patients________she39。s sure they are all taken good care of.A.unless B.because C.since D.if【答案】A【解析】句意:這個護士不會離開她的病人,除非她確定病人們都被照顧得很好。because因為,引導原因狀語從句;since自從,引導時間狀語從句;既然,引導原因狀語從句;if如果,引導條件狀語從句;unless除非,如果不,引導條件狀語從句。根據句意可知,這里考查的是從屬連詞unless,故選A。14. 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:我不能把車免費停在這里嗎? 如果你在這家超市花費超過100元,你可以免費停車四個小時。though 雖然;if 如果;unless 除非。這里是形容一種條件,如果消費超過100元,就能免費停車,故選B。15.He has made great progress his mother is very pleased with him.A.so;that B.enough;to C.so;too D.such;that【答案】D【解析】【詳解】句意:他已經取得了如此大的進步以至于他的媽媽對他非常滿意。從句意可知這里需要用到“如此….以至于”so+形容詞/副詞+that或such+名詞+that, 根據句子中的great progress意思是很大的進步,是名詞短語, 故用such…that, 故選D。16.——Today’s young people can’t live without smart phones.——They keep their hands on the phones wherever they go, even while they meals.A.have B.are havingC.were having D.will have【答案】B【解析】【詳解】句意:——今天的年輕人沒有智能手機無法生活?!麄儫o論走到哪里,甚至吃飯時,手里都拿著手機??疾榫渥訒r態(tài)。;;;。while后跟進行時態(tài),主句時態(tài)是一般現在時,可知while后面的從句時態(tài)用現在進行時。故選B。17. He made a mistake, but then he took action to change the situation ________ it got worse.A.until B.when C.before D.because【答案】C【解析】試題分析:句意:他犯了一個錯誤,但他在它變得更糟前采取了行動改變現狀。Until直到;when當時;before在之前;because因為。根據句意可知選C??键c:考查連詞。18.Let39。s go climbing Langshan Mountain this Saturday __________ the weather is fine.Good idea!A.though B.if C.unless【答案】B【解析】【詳解】句意“如果天氣好,周六我們去爬崀山吧。好主意”。(引導讓步狀語從句);(引導條件狀語從句);(引導