C. more and more beautiful D. more beautiful and beautifuler

二． 用括号里所给单词的正确形式填空

1. Tom is __________(tall) than Sam.

2. Pedro is __________(funny) than Paul.

3. Allan is __________(thin) than Peter.

4. Beth is __________(friendly) than Tara.

5. Tara is __________(outgoing) than Tina.

6. Tina is much __________(serious) than Ann.

7. Laura is a little __________(quiet) than her brother.

8. Frank is __________(good) at writing than at reading.

9. Jane is ___________(hard-working) than Judy.

10. Lisa sings ___________(clearly) than Nelly.

11. Molly studies __________(hard) than Mary.

四．分类

规则变化 不规则变化 -er/ -ier more

五．辨析beat/win