Пожалуйста помогите поставить глаголы в правильное время!!!!!1) He (to finish) his work...

Question

Пожалуйста помогите поставить глаголы в правильное время!!!!!
1) He (to finish) his work when I (to call) him.
2) When we (to come) to the station the train (to go) already.
3) The postman (to come) after lunch and (to bring) me a letter which I (to expect) for a long time.
4) I (to work) at my English for an hour.
5) Outside everything (to be) in deep snow.
6) He (to listen) to that record yesterday at 5.
7) How long they (to walk) before you (to call) them back?
8) When John and I (to get) to the river , the boat race (to start) already.
9) His parents (not to live) there any longer.
10) The concert (to be) a greater success than we (to expect).
11) We could not go out because it (to rain) hard since early morning.
12) What you (to do) when I (to come) in ?
13) When I (to come) to his house , they (to tell) me that he (to leave) an hour before.
14) Before I (to come) he (to study) physics for 2 hours.
15) I (to try) to find my old exercise book for 20 minutes , when you (to come).
16) At last the librarian (to give) me the book which I (to wait) for during 2 months.

Answer 1

1) He was finishing his work when I called him. 
2) When we came to the station the train had already gone.
3) The postman  came after lunch and brought me a letter which I had been expecting for a long time.
4) I have been working at my English for an hour.
5) Outside everything was in deep snow.
6) He was listening to that record yesterday at 5.
7) How long had they been walking before you called them back?
8) When John and I got to the river, the boat race had already started.
9) His parents do not live there any longer.
10) The concert was a greater success than we had expected.
11) We could not go out because it had been raining hard since early morning.
12) What were you doing when I came in?
13) When I came to his house, they told me that he had left an hour before.
14) Before I came he had been studying physics for 2 hours.
15) I had been trying to find my old exercise book for 20 minutes, when you came.
16) At last the librarian gave me the book which I had been waiting for during 2 months.