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.