—Youlikemusicverymuch.Didyousingasongattheparty?—No,but...

問題詳情：

—You like music very much. Did you sing a song at the party?

—No, but Helen       .

A. did                        B. do                                  C. didn’t

【回答】

 A  did代指sing這個動詞，且時態應爲一般過去時

知識點：動詞時態

題型：選擇題