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11.Man must keep in mind that it will be years ______ the earth recovers from the damage he makes to it.(  )
A.whenB.beforeC.sinceD.until

分析 人类必须要记住:地球需要很多年才能从所遭受的毁坏当中恢复.

解答 答案:B
句型搭配it will be+时间段+before从句,表示多久以后才;when当…时候,since自从,until直到.故选B.

点评 从属连词是连词的一种,用来引导名词性从句和状语从句.大致可分为三大类:that(无词义,不做成分)if,whether (表达是否的意义,但不做句子成分); 连接代词:who,whom,whose,what,which,whatever,whoever,whichever(有词义,在句子中可作主语、表语、宾语);连接副词:when,where,why,how,how many,how long,how far,however,whenever,wherever (有词义,作从句的状语).学习时,要注意区分和掌握.

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