问题

Who didn’t turn off the light after school yesterday– It ______ be Lucy. She told me she was the last one to leave the classroom.

A:must
B:mustn't
C:might
D:can't;

正确答案是：

同类题型

The new trend of living a low carbon life is gradually changing people’s idea on ______is cool and in fashion.

As a matter of fact, I dislike this plan; I hope you can ________ a better one.

The research is so designed that once ______ nothing can be done to change it [ ]

The train leaves at 6:00 p.mSo I have to be at the station ____5:40p.m.at the latest

What’s that—–It’s an ______.