1) Have you done your homework?
Yes, I have. I've just finished.
2) Is your brother playing computer now?
No, he is not. He is reading a detective story.
3) What are you going to do tomorrow?
I'm going to visit my granny.
4) Do they go to school on Saturdays?
Yes, they do. They have five lessons.
5) Did the students take part in the competition yesterday?
Yes, the did. They won the competition.