Odpowiedź :
1. have worked
2. has arrived
3. have forgotten
4. have read
5. has met
6. haven't done
7. has been
8. have we known
9. hasn't sold
10. have bought.
1. have worked
2. has arrived
3. have forgotten
4. have read
5. has met
6. haven't done
7. has been
8. have we known
9. hasn't sold
10. have bought.