—Howdidyouliketheconcertlastnight? —Ienjoyeditverymuch...

問題詳情：

 —How did you like the concert last night?

 —I enjoyed it very much, but the dancers ______ a better job.

  A. could have done       B. couldn’t have done      C. must do      D. must have done

【回答】

A

知識點：虛擬語氣與情態動詞

題型：選擇題