Exercise 4:
1. Before I passed the exam, I had worked very hard for it.
2. After I had considered what to study, I decided to major in Maths.
3. Before she went to bed, she had written a letter.
4. After he had checked the prices , he bought a cassette.
5. Before he felt better , he had taken some medicine.
6. After they had argued , they fought .
7. Before she had a fatal accident, she had gone out for a walk.
8. After she faced the matter, she had decided to go away.
9. Before we wrote the assignment, we had read the books.
10. After she watched the film, she wrote a report.
Exercise 1:
1. went.
2. was raining - left.
3. telephoned - was reading.
4. was coming - met.
5. were having - came.
6. was talking - saw.
7. was leaving - called.
8. was getting - slipped - broke.
9. fell - hurt - was riding.
10. was walking - saw.
11. was studying.
12. were they doing.
13. met.
14. taught.
15. didn't go .
16. was working.
17. gave.
18. were playing.
19. bought.
20. was doing.
chúc bạn học tốt cho mik câu trả lời hay nhất nha
