Rewrite the following sentences:
1.Doing physical exercises is good for you. It's........
2.Jenny started working as a singer six yeara ago. Jenny has.....
3.The last time I read this book was three months ago. I haven't........
4.Let's have a walk before going to bed. What.....
5.This is the first time he has ever gone abroad. He has.....
6.I play more computer games than my brother. My brother plays......
7.How long have you studied art ? When..............?
Giúp mik làm bài này mik cảm ơn trước!