Раскройте скобки,употребляя глаголы в past indefinite и past continuous 1.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 triends(to discuss)simething when we(to interrupt)them.4.my mother(to watch)tv,wheni(to come)into the room.5.i haven't seen him since he(to move)to his newflat.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 thr telepone(to ring).8.i(to sit)on the river bank , 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 enrer)the romm ,i(to stand)at the window.12.when we (to enter)the room he(to smoke and to speak)to h7s 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 husband(to wach)tv

1.while she was playing the piano, i was writing a letter.2.he was going   to the university, when i met her.3.our friends were   discussing something when we interrupted them.4.my mother was   watching tv, when i came into the room.5.i haven't seen him since he   moved to his newflat.6.when i was looking out of the window, i saw that it was raining hard and people were  hurrying along the street.7.we were leaving the   house, when the telephone rang.8.i was sitting on the river bank , when my friends joined me.9.when i came up to him, he was speaking to his friends.10.we met her when she was walking home.11.when she   entered the room ,i was standing at the window.12.when we   entered the room he was   smoking   and   speaking to his friends.13.i was watching tv when somebody knocked at the door.14.what were you   doing ,when i rang you up yesterday? 15.her son was cooking dinner, when she came home. 16.she was   watering the flowers, while her husband was watching tv  

A- когда предмет в предложении употребляется в 1 раз. the- когда предмет употр.во второй раз а- если мы говорим об обобщённом значении предмета(a girl-тоесть любая девочка) the-определённый предмет(the girl-какая-то конкретная девочка) можно сказать зависит от контекста