问题 选择题

—Has Billy finished his homework today?

—I have no idea.He        it this morning.

A.would do

B.was doing

C.has done

D.had done

答案

答案:B

依据答语中的时间状语可推知,比利作业未完成。他今天上午一直在做。过去进行

时除表示某段时间内一直在进行的动作外,还可表示某时刻正在进行的动作。如:

I was reading a book when he came in.

单项选择题
单项选择题