根据句意，用括号中所给单词的适当形式填空。   

1. He is          (short) and          (thin) than me.

2. I ____ ( buy) presents on my holiday.

3. What          (do) you do last weekend?

4. Sarah          (feel) sad, because she failed her math test.

5. Amy can       _ (play) the violin.

6. I like         (ride) my bike and __     (swim).

7. — Does your mother ____ (teach) math?

    — No, she doesn't. She _       (teach) English.