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）