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9.For some time now,world leaders _____ out the necessity for agreement on climate change,the world economy and African development.(  )
A.had been pointingB.have been pointing
C.were pointingD.pointed

分析 一段时间以来,世界首脑都一直指出有必要就气候变化,世界经济和非洲的发展问题达成共识.

解答 答案:B.根据该句中的时间状语for some time now可以看出,主句的动作从过去某一时间开始一直持续到现在,而且动作可能还会延续,故应该用现在完成进行时.所以答案是B.

点评 考查现在完成进行时.现在完成进行时和现在完成时的第二种用法类似,常和since,for引导的时间状语连用.

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