用括号内所给单词的适当形式填空。

1. Tom is ______than Jack (calm).

2. Lin Peng is a little ______than me (outgoing).

3. My brother is not as ______as I am (athletic).

4. She has ______chicken than I do (much).

5. My cousin is ______at English than I am (good).  

6. Liu Li has ______books than I do (many).

7. My bag is too______, I can't take it home myself (heavy).

8. Jack is good at schoolwork, he is very ______(serious).

9. In some ways, they look ______(different).

10.It's ______for us to learn physics well (necessary).