6. didn't do

7. Did...live

8. watched

9. Did...be

10. didn't be

Bài 2: 1. C didn't catch

2. C came

Bài 1: 1. were building

2. was driving

3. was chatting/was teaching

4. was watching

5. was preparing

6. were...doing

7. were...going

8. weren't going

9. wasn't doing

10. was reading/was playing

b. Rewrite the sentences, using the words given.

1. This is the first time my father has driven a car.

2. It's the first time I have met such a famous singer.

3. It's the first time she has been to the ballet.

4. This is the first time she has drunk Coca Cola.

5. It's the first time I have read this book.

6. It's the first time I have met such an intelligent student.

7. My grandfather hasn't been to hospital before. .

6.Didn't do

7.Did you live

8.Watched

9.Was your friend at

10.Weren't

Bài 2: 

1.C 

2.C 

Bài 1: 

1.Were building

2.Was driving

3.Was chatting/was teaching

4.Was watching

5.Was preparing

6.Were you doing

7.Were you going

8.Weren't going

9.Wasn't doing

10.Was reading/was playing

7.→The Browns began to living in London 20 years ago.
8. →John started working for this electronics firm in 1999.

b.

1.This is the first time my father has driven a car

2.It's the first time i have met such a famous singer

3.It's the first time she has been to the ballet

4.This is the first time she has drunk Coca Cola

5.It's the first time i have read this book

6.It's the first time i have met such an intelligent student

7.My grandfather hasn't been to hospital before

chúc bạn học tốt!!!!