Помогите открыть скобкиПожалуйста!

1. He studied French before he entered the university.
2. The boy wanted to act the main part in the play because he organized the theatre.
3. Lanny not knew who attacked him in the darkness
4. Suddenly he remembered that he not ringed her in the morning
5. By the time the train reached the city, he мейд friends with many passengers
6. Tom returned to the cinema by five o' clock
7. He thought that he lost the money
8. Ann told me that she saw an interesting film
9. When i woke up yesterday, father already got to work
10. Nick thought that his father not yet came home.
11. Yesterday I found the book which i lost in summer
12. When we came to the station the train already left
13. The house was very dirty because we not cleaned it for weeks
14. Mr. Greaves left his job to years ago
15. I not played golf when i was on holiday last summer