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    10．-What did you hear last night? -I seemed someone knock at the door. A．to have heard B．to be heard C．to be hearing D．having heard 【查看更多】

     

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    从所给的四个选项中选择最佳答案

    —What did you hear last night?

    —I seemed ______ someone knock at the door．　　　

    [　　]

    A．hear　　　B．to have heard　　　C．to hear　　　D．being heard

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