题目内容
7.Katherine ______ on that poem for a month,and it's still not finished.( )A. | had been working | B. | has been working | ||
C. | has worked | D. | had worked |
分析 Katherine写那首诗一个月了,它还没有写完.
解答 答案:B 考查时态辨析.根据for a month和it's still not finished,表示Katherine在一个月里"一直在写",要用现在完成进行时态.A项是过去完成进行时态,句中没有表示过去的时间状语;C项是现在完成时态,表示已写完;D项是过去完成时态,同样,句中没有表示过去的时间状语.
点评 解答此类问题要了解各种时态的用法,然后根据上下文和结合语境选择答案.
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