С) 1. he (to break) a window yesterday. 2. i (to bring) a letter before she (to call). 3. mary (to watch) tv while they (to cook) supper. 4. my mum (to come) home by 6 yesterday. 5. you (to open) the window when you (to return) yesterday. 6. the students (to prepare) for the exam from 3 to 7 last monday. 7. they (to study) in london for 4 years. 8. after 1 (to see) her 1 (to remember) that we (to meet) many years before. 9. nick (to visit) the usa after he (to icarn) english. 10. they (to wait) for us all day long yesterday. 11. peter (to go) to school since 2000. 12. the day before yesterday we (to write) a composition.
2 had brought\called
3.was watching\were cooking
4had come
5 opened\had returned
6 were preparing for
7 have been studing
8 had seen\remembered\had met( насчет этого не уверена)
9 visited\ had learnt
10 were waiting
11has been going to school
12 wrote