—Wouldyouliketoseeafilm,Helen?  —No,John.I

問題詳情：

 — Would you like to see a film, Helen?

   — No, John. I ________ my homework.

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

【回答】

D   

知識點：動詞時態

題型：選擇題