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—Couldyougotobuysomesaltforme,Vince?—I'dloveto,Mum,butI...

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問題詳情:

—Couldyougotobuysomesaltforme,Vince?—I'dloveto,Mum,butI...

—Could you go to buy some salt for me,Vince?

—I'd love to,Mum,but 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