用所给单词的适当形式填空。

1. I think the man on the left is _______ than the man on the right. (outgoing)

2. She usually _______ her homework. (do)

3. — How do you get to school?

    — I get to school on _______. (feet)

4. He has a _______. (head) (头疼)

5. Where are you _______ for vacation? (go)

6. My mother often _______ to work by bike. (go)

7. — What are you doing for vacation?

    — I _______ my sister. (baby-sit)

8. "I have a toothache." "You should _______ a dentist." (see)

9. Amy _______ to do her homework. (have)

10. Lucy is _______ than Li Li. (popular)