Раскройте скобки, употребляя глаголы в Past Indefinite и Past…

Раскройте скобки, употребляя глаголы в Past Indefinite и Past Continuous1.While she (to play) the piano,I (to write) a letter.2.He (to go) to the University,when I (to meet) her.3.Our friends (to discuss) something when we (to interrupt) them.4.My mother (to watch) Tv,when I (to come) into the room.5.I haven't see him since he (to move) to his new flat.6.When I (to look) out of the window,I (to see) that it (to rain) hard and people (to hurry) along the street.7.We (to leave) the house,when the telephone (to ring).8.I (to sit) on the river nbank,when my friends (to join) me.9.When I (to come) up to him,he (to speak) to his friends.10.We (to meet) her when she (to walk) home.11.When she (to enter) the room,I (to stand) at the window.12.When we (to enter) the room he (to smoke and to speak) to his friends.13.I (to wach) TV,when somebody (to knock) at the door.14.What you (to do) ,when I (to ring) you up yesterday? 15.Her son (to cook) dinner,when she (to come) home.16.She (to water) the flowers,while her husbands (to wach) TV