За и 3b
!!!!!!!!!!!!!+++++!+!

3a
3. They are watching TV.
4. They aren't sleeping.
5. She is at home.
6. She is cooking breakfast.
7. He is at home.
8. He isn't cooking breakfast with granny.
9. He is reading a newspaper.
10. I'm at home.
11. I'm not watching TV with my parents.
12. I'm doing my homework.

3b
It's 8 o'clock. My parents are at home. They aren't sleeping, but they are watching TV now.
My granny at home and she is cooking breakfast for us. Grandad is reading an old newspaper.
I'm also at home , but I'm not watching TV with my parents. I'm doing my homework at the moment.