Помогите пожалуйста,очень необходимо,кину 20 баллов

1. By two o'clock the teacher (had examined) all the students. 2. On my way to school I (remembered) that I (had left) my report at home. 3. All my friends (were) glad to hear that I (had passed) all the examinations successfully. 4. Poor Oliver (was lying) unconscious on the spot where Sikes (had left) him. 5. He (opened) his eyes, (looked) around and ( tried) to remember what (had happened) to him. 6. All the passengers (saw) at once that the old man (had travelled) a great deal in his life. 7. By the time we (came) to see him, he (had returned) home. 8. During the holidays my friend (visited) the village where he (had lived) in his childhood. 9. When they (entered) the hall, the performance had already ( begun). 10. When I came home, my mother (told) me that she (had received) a letter from grandfather. 11. Where had you (been working) before you (entered) the institute? 12. He (had been  studying) French before he (entered) the university. 13. Lanny (saidy) that he (had got) his education in Cape Town. 14. The boy ( wanted) to act the main part in the play because he (had organized) the theatre. 15. Lanny (did not know) who (had attacked) him in the darkness. 16. The girl (was) glad that she (had found) a seat near the window. 17. Suddenly he (remembered) that he (had not rung) her up in the morning. 18. By the time the train (reached) the city, he (had made) friends with many passengers. 19. When my uncle (had left), he (hurried) to the station to book a ticket. 20. She (thought) that Gert and Lanny (had quarrelled).