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17.How long do you think         China fulfils its drean of becoming a low carbon  leader in the world?(  )
A.it will be beforeB.will it be until
C.will it be whenD.it will be that

分析 你认为多久以后中国会实现成为世界低碳国家领头羊的梦想?

解答 答案:A 题干中think后接宾语从句,从句要用陈述句语序,排除BC;句意表达是多久以后才,it will be+时间段+before从句,不是不久就,多久以后才.故选A.

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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