根据句意用恰当的介词填空，补全句子。

1. Can you say it _____ English?

2. Mary often has a dancing lesson _____ Saturday mornings.

3. The detective story begins _____ the accidental death of the young man.

4. The sad face is made with a colon and a left bracket _____ it.

5. The trains run _____ time.

6. The baby is asleep _____ its mother's lap.

7. You should use the e-mail English _____ the proper time.

8. He talks _____ a funny way.

9. You are supposed to eat steak _____ knife and fork.

10. Lucy and Lily are twins. They look _____ each other.

图书的常见开本有三种，下列哪种不常见（）

A、24开

B、32开

C、64开