根据答句写问句。
1.—______________________________
—He is playing basketball.
2.—_________________________________
— My sister is at home.
3.—_________________________________
— We are going to go to school at eight o'clock.
4.—_________________________________
— I want a sweater.
5.—_________________________________
— I am going to watch TV1.What is he doing?
2.Where is y'our sister?
3.When are you going to go to school?
4.What do you want?
5. What are you going to do?