Ex2.

7, I don't think you should smoke.

8, What do you buy this machine for?

Ex3.

Part 1.

1, It was not until 9 p.m when they came back.

2, This hospital was built by the local authority in 1980.

3, If the bus wasn't late this morning, I wouldn't be late for school.

4, If he studies his lessons very carefully, he wouldn't get bad marks.

Part 2.

5, How often does Jane ride her new car? ( Mình nghĩ là nên đổi like thành ride )

6, Jack shouldn't go to bed so late.

7, I try to learn English hard to find a good job.

8, Our house was built by my grandfather in 1990.

Ex3.

Part 1.

1, Some books are read by Lan in the library every Sunday.

2, I can't take you to the concert because I don't have a spare ticket.

3, They didn't study hard, so they failed the exam.

4, It was not until he stops working when he feels tired.

Part 2.

5, The student studied hard to get good results.

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