We were happy when the sun (to rise), for the night (to be) very cold,6. Where you (to put) my dictionary? I can­not find it anywhere. 7. I (not yet to fall) asleep when the telephone (to ring). 8. What you (to do) from six till nine yesterday? 9. The children (to play) here at eleven o'clock, but now they (to go) home. 10. Go to see your old grandfather as soon as you (to arrive) in Novgorod. 11. At last the librarian (to give) me the book which I (to wait) for during two months. I was very glad. I (to go) home and (to begin) reading it at once. 12. Don't speak to him: he (to be) very busy, he (to do) some very urgent work, раскрыть скобки

6. Where did you put my dictionary? I cannot find it anywhere.
- The verb in the sentence is "put", which is in the past tense. So the correct form of the verb "put" is "did you put".

7. I had not yet fallen asleep when the telephone rang.
- The verb in the sentence is "fallen asleep", which is in the past perfect tense. So the correct form of the verb "fallen asleep" is "had not yet fallen asleep". The verb "rang" is in the simple past tense, so we leave it as it is.

8. What were you doing from six till nine yesterday?
- The verb in the sentence is "do", which is in the past tense. So the correct form of the verb "do" is "were you doing".

9. The children were playing here at eleven o'clock, but now they have gone home.
- The verb "play" is in the past continuous tense, so the correct form is "were playing". The verb "go" is in the present perfect tense, so the correct form is "have gone".

10. Go to see your old grandfather as soon as you arrive in Novgorod.
- The verb in the sentence is "arrive", which is in the simple present tense. So the correct form of the verb "arrive" is "as soon as you arrive".

11. At last the librarian gave me the book which I had been waiting for during two months. I was very glad. I went home and began reading it at once.
- The verb "give" is in the simple past tense, so we leave it as it is. The verb "wait" is in the past perfect continuous tense, so the correct form is "had been waiting". The verbs "go" and "begin" are in the simple past tense, so we leave them as they are.

12. Don't speak to him: he is very busy, he is doing some very urgent work.
- The verb "be" is in the present continuous tense, so the correct form is "is". The verb "do" is in the present continuous tense, so the correct form is "is doing".