句型转换。
1. The black socks are $7. 00. (对划线部分提问)
    _____ _____ are the black socks?
2. The store sells clothes. (改否定句)
    The store_____ _____ clothes.
3. I want a red sweater and white pants. (对划线部分提问)
    _____ _____ you want?
4. He has hamburgers for dinner. (对划线提问)
    _____ _____ he_____ for supper?
5. I sell some fruit to Tom. (改同义句)
    Tom_____ some fruit_____  _____.
6. Can I help you? (改同义句)
    _____ can I_____ _____ you?