用所给词的适当形式填空。

1. More than 220 _________ (country) take part in (参加) Shanghai World Expo (世博会).

2. —Can you tell me the place you live in?    —__________. (certain)

3. Be __________ (friend) to others, and you will make many friends.

4. I like the style of the dress, but I don't like __________ (it) color.

5. We usually have our meals in the __________ (sit) room.

6. It's 5 o'clock in the afternoon. The students __________ (clean) their classroom.

7. What about __________ (tell) us something about your school life.

8. We are having a fashion show. We want __________ (raise) money for Project Hope.