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    精英家教网 > 高中英语 > 题目详情
    —Can you tell me if Tom has finished his homework?
    —I've no idea. He ________ it this morning.
    A．has being doingB．had done
    C．is doingD．was doing
    D
    答案：D　考查动词时态。句意为：——你能告诉我Tom是否完成家庭作业了？——我不知道。今天早上他正在做。根据答语可知，做作业的动作发生在过去，强调的是当时的动作正在进行，因此用过去进行时。故D项正确。
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