句型转换。
1. David is going to have some Chinese classes tomorrow.(改为否定句)
David _____going to have_____Chinese classes tomorrow.
2. The students of Class Two have afield trip on sunday.(用next sunday)
The students of Class Two_____ _____ _____ _____.afield trip next sunday.
3. —They are going to go fishing tomorrow morning.(改为一般疑问句，并作肯定回答)．
going to go fishing tomorrow morning?
—Yes, they_____.
4. I'rn going to be a computer programmer.(对画线部分提问)
_____ _____ _____going to be?
5. She is going to leave at nine tomorrow.(对画线部分提问)
_____ _____she going to leave?
