句型转换。(1*10=10)
1. We want to join the chess club. (划线提问)
________ ________ do you want ______ _______?
2. David can play the guitar. (改成一般疑问句)
_____ David ______ the guitar? 
3. Wu Dong can play football. （就划线部分提问）
______ can Wu Dong _________?
4. I can sing and dance. (改成否定句)
I _______ sing  ______dance.