问题

She ____ on her homework in her study now .

A:must work
B:can work
C:must have worked
D:must be working

正确答案是：

同类题型

I hope you _______ to my party next Sunday.

We are going on a trip to Shanghai next week. — ________!

Gilbert wasn’t ______ the time this morning, so he was late for school.

You are grownup now, so it’s up to you to decide whether to________English or French.

Finally we decided to fly to France for the winter holiday on our first stop， we planned to stay for three days．