1. The pupils(had done) a lot of exercisses before they (to learnt) to write the dictations well.
2. The sportsmen (has been training) since morning. Now they (are going) over the high jump as they (are not ) satisfied with their results.
3. Five minutes (had not passed) when the train for which we (were waiting/had been waiting appeared) in the distance.
4. Has anyone (seen) my dog?
5. Are you ( going) to the sports centre today?