根据句意补全单词。
1. —You shouldn't shake hands with her. You should bow.
—I'm sorry. I don't know the _____ here.
2. There are
lots of _____ in the school. You must obey them.
3. There are many trees on both _____ of the street.
4. The machine doesn't work. Is there_____ wrong with it?
5. He_____ the present yesterday, but he didn't want to accept it.
6. The policemen_____ the thief by the arm.
7. When we were in Shanghai, we took many photos with a _____ .
8. It often rains in England. When you go there you'd better take an _____ .
9. The actor's _____ is very wonderful. We are interested in it.
10. You can buy this medicine in a _____ .
