—Oh,my!ProfessorSmithandyouhavebeenfriendsforovertenye...

問題詳情：

 — Oh, my! Professor Smith and you have been friends for over ten years.

   —Yes, since he      to China.

   A. came                       B. has come           C. had come          D. comes

【回答】

A

知識點：一般過去時及其被動式

題型：選擇題