Odpowiedź :
1. We have missed the train
2. Nicolas has bought a new mobile phone
3. I haven't had time to tidy my room
4. What has your mother cooked for dinner?
5. Have you heard about Mary?
6. She hasn't finished her work
7. Has he borrowed your pen?
8. I haven't seen Julia this morning
9. Ernie has broken his leg four times
10. Our friends haven't played volleyball this month