7. I got a sore throat because I have been speaking for 3hours.

=> have spoken

8 . It is raining hard. We can't do anything until it stopped.

=> stops

9 . She had got into her shoes, put on her coat and went to the door.

=> bỏ had

10 . What tune had they played when we came in?

=> were they playing

11 . That evening we stayed up to talk about the town, where he has lived for a long time.

=> Ko cs lỗi sai

12 . I have lived in this city for 15 years. My family had moved here when I was 10 yearsold.

=> bỏ had

13 . We are very tired. We have walk for threehours.

=> walked

14 . I haven't seen her since we leaved school

=> left.

15 . I have been thought about you a lot lately and I have come to conclusion that I won't be able to live withoutyou.

=> bỏ 

16 . Coming into his room, he found that someone broke into it.

=> has broken

17 . It always rains when they had just cleaned thewindows.

=> have

18 . The last time I saw him, he wore a blacksuit.

=> was wearing

19 . By the first of next July I had worked for this company for 20 years.

=> had been working

20 . This is the talking between two friends who had just met up each other.

=> have

7. have been speaking => have spoken

8 . stopped=> stops

9 . had => x

10 .had they played => were they playing

11 . đúng

12 . had => x

13 . walk=> walked

14.leaved=> left.

15 . been => x

16 .  broke => has broken

17 .  had => have

18 . wore => was wearing

19 .  had worked => had been working

20 . had=> have