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.