Put the verbs in brackets into the past perfect or the past perfect continuous, as in the example.

1. They had been driving ( drive ) for two hours before they finally reached their destination. - Przykład
2. Emily .......... ( write ) five letters by lunchtime.
3. The doctor told John to stay in bed until he .......... ( fully / recover ).
4. Thomas .......... ( study ) for six weeks by the morning of the exam.
5. Peter .......... ( already / learn ) to read and write before he started school.
6. The baby .......... ( cry ) for half an hour before it finally fell asleep.
7. The children .......... ( wait ) for an hour when the school bus arrived.
8. The burglar .......... ( get away ) by the time the police arrived.
9. She .......... ( dig ) in the garden for three hours when she stopped for a break.
10. By the time he was eighteen, he .......... ( become ) a professional athlete.