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    3．-I counted sheep，I drank milk and I tried everything，but nothing helped．
    -It seems you _____ too much recently．Try some sleeping pills．（　　）
    A．workedB．work
    C．had workedD．have been working

    分析 --我数羊，我喝牛奶并且尝试了所有的方法，但是什么都不起作用．
    --似乎你最近工作太多了；尝试一些安眠片．

    解答 答案是D．本题考查现在完成进行时．题干中"recently"是现在完成时的标志，根据答句中的"Try some sleeping pills"可知失眠的状态还在进行中，故排除A、B和C，用现在完成进行时，表示从过去某时开始到现在这一段时间里一直延续着的动作还在继续进行，故选D．

    点评 完成进行时的解题首先要理解其时态的基本用法--表示从过去某时开始到现在这一段时间里一直延续着的动作，特别关注其"在进行中"的特征；然后在语境中寻找动作的时间依据进行判断．

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