句型转换，每空一词.
1. He works in a bank. (就画线部分提问)
_____ _____ he _____ ?
2. They are workers. (就画线部分提问)
_____ _____ they?
3. I want to be a teacher. (就画线部分提问)
_____ _____ you want to be？
4. Tom wants to be a policeman. (改为否定句)
Tom _____ _____ to be a policeman.
5. He wants to be a football player. (改为一般疑问句)
_____ he _____ to be a football player?