The key answer of exercise 4

a)

1. She likes listening to music.
2. I am an architect.
3. Are you feeling alright?
4. When can I visit your house?
5. Let's discuss this tomorrow.
6. He doesn’t come here often.
7. We come from Germany.
8. Where did you go yesterday?
9. I have lived in this town all my life.
10. My wife is a really good cook.

b)

1. 6
2. 3
3. 9
4. 7
5. 1
6. 2
7. 10
8. 4
9. 8
10. 5