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5.--Mum,it's late.Why are you still here?
--Dad hasn't come back yet.I          for him.(  )
A.am waitingB.was waitingC.waited

分析 --妈妈,很晚了,你为什么还在这里?
--你爸爸还没有回来,我在等他.

解答 答案:A.
根据答语的语境"你爸爸还没有回来,我在等他."判断设空处的动作"等待"在说话时刻正在进行着,所以用现在进行时.现在进行时的构成是:主语+am/is/are+动词的现在分词;主语是I,be动词用am,故答案为A.

点评 本题考查了动词的时态.做题时,一定要特别关注有关的时间短语,这是判断句子时态的标志.在没有时间状语的情况下可以联系上下文根据语境来做出正确判断.

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