Ответ:
Part 1.
1. We are reading an interesting book now.
2. Listen! Kate is singing in her room.
3. Tom is running in the yard at the moment.
4. My friends are watching an American film now.
5. What are you doing now?
6. I'm writing an English exercise.
7. Susan isn't going to the school, she's going to her sister.
Part 2
1. Helen is learning an English poem now.
2. The children are looking at the blackboard now.
3. Mary is opening the window now.
4. My parents are working now.
5. I am singing a song now.
6. The boys are playing table-tennis now.
7. The pupil is writing a composition now.
8. I am speaking in English now.
9. My parents are cooking dinner now.
10. Mary and Ann are helping their mother at home now.