用所给单词的适当形式填空。

1. We hope you can give up _____ (smoke). It is bad for your health.

2. He'll be OK if I do one small ____ (operate) on him.

3. Our _____ (agree) was that you would pay for our bill by the end of the month.

4. Paul is older than me. He is my ____ (old) brother.

5. We should fight against ____ (pollute).

6. There are many _____ (wolf) in the forest.

7. Mr. Brown has worked with several ____ (German).

8. With the _____ (develop) of the economy, all the things have changed.

9. Everyone is ______ (suppose) to do it.

10. I wonder how _____ (learn) English well.