---IsthatMr.Green?    ---Impossible.HehasgonetoAmer...

問題詳情：

     --- Is that Mr. Green?

     --- Impossible. He has gone to America. It                  be him.

      A. could                        B. must                        C. can't                         D. might

【回答】

C

知識點：情態動詞

題型：選擇題