1. Going to bed early is good for your health.( 用bad 写出一个选择疑问句.)
    _____ going to bed early good _____ bad for your health?
2. Don't smoke here. (同义句) 
    You _____ _____here.
3. You'd better eat more fruit and vegetables. ( 改否定句)
    You'd _____ _____ eat more fruit and vegetables.
4. He has a cough.( 划线部分提问)
    _____ is the _____  with him?
5. We should keep our rooms clean and open the windows often to fight SARS. (划线提问)
    _____ _____ we do to fight SARS?
6. They will leave for Beijing tomorrow.(改为一般疑问句)
     ______ _______ leave for Beijing tomorrow?
7. You must take care of yourself.(改为同义句)
    You ______ ________ take care of yourself.
8. He taught himself on the Internet.(改为否定句)
    He ______ _______himself on the Internet.
9. They are playing games in the park. (用next Sunday改写)
    They _____ _____  games in the park next Sunday.
10. May I buy some milk for supper tomorrow?(否定句回答) ,
      _____ you _____  .