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    【题目】--- Look at the sweat on her face.

    --- She ________ the house since she got up this morning.

    A．is cleaning B．has been cleaned

    C．was cleaning D．has been cleaning

    【答案】D

    【解析】

    试题分析：本题考查时态。句中出现了since，要用现在完成时，对话发生时，说明动作仍在延续并且可能持续下去，要用现在完成进行时，故选D

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