The key answer of exercise 2

a)

1. Has Peter arrived?
2. Have you done
3. I haven't made
4. I've cut
5. I've made

b)

1. I've already done the washing.
2. Have you made any plans for the weekend yet?
3. We haven't finished lunch yet.
4. Daniel has already tidied his room.
5. I've already done the ironing.
6. Have you been to the supermarket yet?
7. I haven't cleaned the bathroom yet.
8. Edward has already taken out the rubbish.

c)

1. 've just missed
2. 's just fallen
3. 've just won
4. 've just cleaned
5. 's just laid
6. 's just done

d)

1. I've just got on the bus.
2. Have you made dinner yet?
3. I haven't started yet.
4. I've just been to the shop.
5. I've cleaned the flat.
6. I've already laid the table.