1. B)根据括号内的要求完成下列各题，每空一词(含缩略形式)。

1. （1） —Can they join the music club?  (补全肯定答语)

   —Yes． ．

3. （2） My brother has to go to bed early． (改为一般疑问句)

   your brother to go to bed early?

5. （3） You can't play comouter games at school．(改为祈使句)

    computer games at school.

7. （4） Let her dance with them here·  （改为否定句）

   Let her with them here．

9. （5） I have to take an art lesson every Sunday． (对划线部分提问)

    you have toevery Sunday?