Ответ:
1. I am reading.
2. He isn't writing.
3. We aren't working.
4. Are you reading?
5. Is he sleeping?
6. Nick and Mike are playing football.
7. Kate is playing the piano.
8. She isn't singing.
9. My sister is sleeping.
10. Is dad drinking tea?
11. Are your parents drinking tea?
12. I am not sleeping.
13. She is sitting at the table.
14. We are doing an exercise.
15. We aren’t swimming.
16. Are they playing in the yard?
17. Nina and Ann are washing the floor.
18. Nick is helping his mother.
Объяснение: