----where is Tom?-----he ___his homework at home.A.do B.does C.is doing D.did

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• ----where is Tom?-----he ___his homework at home.A.do B.does C.is doing D.did
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• ----where is Tom?-----he ___his homework at home.A.do B.does C.is doing D.did
• Tom has a new bike,__________A has he B.hasn't he C.does he D.doesn't he是选B还是选D,我感觉选B,为什么有的人说选D呢?
• she is waiting for her mother（对her mother提问）