1. Cleaners collected waste paper or bottles for __________. (recycle)

2. There are all kinds of books on those __________ in the library. (shelf)

3. The __________ trees we plant, the better. (much)

4. “Please help __________ to some fish.” Mother said to the twins. (you)

5. Everyone should make a contribution to __________ (protect) our environment.

6. My aunt works in a __________ factory. (shoe)

7. We should do something to make our country much __________ __________. (beautiful)

8. Lucy is a __________ girl. She does everything __________. (care)

9. The children are very __________. They are playing __________ in the  park. (happy)

10. My mother loves to keep all the windows __________ at night. (close)