用括号中所给词的适当形式填空。

1. My grandparent     __    (do) exercise every morning.

2. Brush your teeth      __   (two) a day.

3.      __  (health) eating habit is bad for you. 

4. Can you tell me the     __   (different) between"look for"and"find"？

5. My mother wants me    __    (play) the piano every day ?

6. Good food and exercise help me      __   (study)better. 

7. Dwelling Narrowness(<<蜗居>>)is an     __    (interest) TV play.

8. Everyone in our class tries     __     (get) good grades. 

9. How often does she   __      (go) to the movies with her parents？

10. —How many    __     (hour) do you sleep every night？

      —Always nine hours.