1) When we came, she had already translated the article.
2) What were you doing when it started raining?
3) Last spring, the flood destroyed hall of the town.
4) Did he buy her a present yesterday?
5) The girl had never heard that music before the concert.
6) When you phoned, I was playing a new computer game.
7) When they arrived at the cinema, the film had already begun.
8) We did not dance a lot at the disco last night.
9) He was telling his friends a frightening story when somebody knocked at the door.
10) The girl was reading her book the whole morning yesterday.
11) What was Linda doing when he came in?
12) Steven and Martin were playing chess at 5 pm.
13) What were you doing when you heard the scream?
14) Who had learned the words by Friday?
15) Had she done her homework before she went to school?
16) When I came home, my mum was cooking dinner for us.
17) What had Martin bought before he took the bus?
18) Did everybody enjoy the trip last summer?
19) I saw that Nancy was writing a letter.
20) Were you pleased to see Ann again?
Объяснение:
2) should
3) can
4) should
5) can
6) ought
7) should
8) have
9) should
10) need