How is/ he is/she is/they are fine.

How are they? They are fine. 

1. Kate cooks dinner every day.

2. I am not eating ice-cream now.

3. Do you go to school every day?

4. What is your brother doing right now?

5. Look. My friends are paying football.

6. Kate doesn`t write letters every day.

7. When does Nick get up? (Тут я немного запутался, т.к. "every morning" может быть ответом на вопрос поэтому я не стал его вставлять в сам вопрос. Хотя может быть спрашивается про время).

8. What is mother doing right now? She is cooking.

9. I am not writing a report now.

10. My sister washes the dishes every morning.

11. When do you go to school?

12. Every morning on the way to school I meet my friends.

13. My friend goes to the library every Wednesday.

14. What are you doing now?

15. Don`t make noise! Father is working.

Kate cooks dinner every day.
I am not eating now.
Do you go to school every day?
What is your brother doing now?
Look! My friends are playing football.
Kate doesn't write letters every day.
When does Nick get up every morning?
What is mother doing now? She is cooking dinner.
I am not writing a report now.
My sister washes the dishes every morning.
When do you go to school?
Every morning on the way to school I meet my friends.
My friend goes to the library every Wednesday.
What are you doing now?
Don't make noise! Father is working.