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—Shallwegooutforawalk?     —Sorry,Ican’t.I

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問題詳情:

—Shallwegooutforawalk?     —Sorry,Ican’t.I

—Shall we go out for a walk?

      —Sorry, I can’t. I _______ my homework.

   A. do                     B. did                       C. am doing                D. was doing

【回答】

C

知識點:動詞時態

題型:選擇題