Ex4:

1. My mum used to live in a small vilage when she was a girl.

2. There did not many vehicles on the roads before.

3. We used to cycle to school two years ago.

4. Now there are more traffic accidents.

5. My uncle used to be a bus driver some years ago.

Ex5:

1. didn't use to

2. used to

3. didn't use to

4. used to

5. used to

Ex6:

1. Dis you use to go to school on foot?

2. Mr. Van didn't use to ride his motorbike dangerously.

3. Did the streets use to be clean and more peaceful?

4. I used to go out on Sundays.

5. They didn't use to go on holiday together.

Ex7:

1. did...use to go

2. used to be

3. didn't use to like

4. used to go

5. used to live

6. used to go

7. used to sit

8. did you use to play

9. used to be

10. are used to walking

11. used to play

12. didn't use to have

13. did they use to

14. used to be

15. didn't use to like

Ex8:

1. did

2. after

3. feels

4. across

5. break

6. rules

7. it

8. vehicle

9. ko có từ

10. accidents

=>
Ex4/
1. My mum used to live in a small village when she was a girl.
2. There did not use to be many vehicles on the roads.
3. We used to cycle to school two years ago.
4. Now there are more traffic accidents than there used to be.
5. My uncle used to be a bus driver some years ago, but now he has a desk job.

Ex5/
1. didn't use to
2. used to
3. didn't use to
4. didn't use to
5. used to

Ex6/
1. Did you use to go to school on foot?
2. Mr.Van didn't use to ride his motorbike dangerously.
3. Did the streets use to be cleaner and more peaceful?
4. I used to go out on Sundays.
5. They didn't use to go on holiday together.

Ex7/
1. did/use to go
2. used to be
3. used to like
4. used to go
5. used to live
6. used to go
7. used to sit
8. did you use to play
9. used to be
10. used to walk
11. used to play
12. used to have
13. Did they use to
14. used to be
15. used to like

Ex8/
1. did
2. after
3. feels
4. across
5. break
6. rules
7. it
8. vehicles
9. không có từ thích hợp
10. accidents