根据要求改写句子。

1. I often have lunch at school. (主语改为第三人称单数he)

    _____ often _____ lunch at school.

2. Carol likes skating. (改为否定句)

    Carol _____ _____ skating.

3. These socks are only ￥5. (对画线部分提问)

    _____ _____ are these socks?

4. Can I help you? (改为同义句)

    _____ can I do _____ you?

5. Thank you. (写出答语)

    _____ _____.