Hi,Jack.YouandMaryhavebeenchattingforhours.Never      ...

问题详情：

  Hi, Jack. You and Mary have been chatting for hours. Never           you talk so much before.

     A. I heard                     B. I had heard               C. did I hear          D. have I heard

【回答】

D

知识点：倒装与省略

题型：选择题