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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