—I don’t know why Tom was absent from yesterday’s meeting.—He must have been sic

题型：不详难度：来源：

—I don’t know why Tom was absent from yesterday’s meeting.
—He must have been sick, _______？

A．isn’t he

B．didn’t he

C．wasn’t he

D．mustn’t he

答案

解析

略

举一反三

After the party, the boy apologized to the girl for the trick he had_______on her.

A．taken

B．played

C．undertaken

D．conducted

题型：不详难度：| 查看答案

I’m not sure whether be has finished writing the book, but he________ it last month.

A．worked at

B．was working on

C．worked on

D．was working at

题型：不详难度：| 查看答案

Not until____________the exam _________ the importance of doing homework.

A．had he failed; he realized

B．he had failed; did he realize

C．he had failed; he realized

D．had he failed; did he realize

题型：不详难度：| 查看答案

Dr. Smith, as well as his wife and daughters , ______ visit Beijing this summer.
A is going to B are going to C was going to D were going to

题型：不详难度：| 查看答案

Had it not been for the fact that she was_________ with her work, she would have attended the concert

A．occupied

B．absorbed

C．devoted

D．concentrated

题型：不详难度：| 查看答案