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.