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.
