-Why hasn’t the speaker turned up? -He the flight. I’ll find it out at once. A.

—Why hasn’t the speaker turned up?

—He _________ the flight. I’ll find it out at once.

A. must have missed                           B. might have missed

C. would have missed                         D. could have missed

试题答案

A

解析:

选项A表示“在某种意义上应该干……”；选项B、D均表示“过去的一种可能性”。根据题意，只能选A。