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.
