用所给单词的正确形式完成下列句子
1. He is very ________ (friend) to us.
2. This book is very ________ (use) to me.
3. We have air ________ (pollute) round us.
4. What about ________ (go) shopping this afternoon?
5. ________ (They) mother is a doctor in this hospital.
6. We can ________ (use) these shopping bags again.
7. I want to go ________ (shop) with my uncle.
8. Let's have a ________ (discuss) tomorrow afternoon.
9. Can they talk to ________ (we) tonight?
10. She never tells ________ (lie) to us. She is an honest girl.