=>
Ex2/
1. D nhấn âm 2 còn lại 3
2. C nhấn âm 1 còn lại 2
3. D nhấn âm 2 còn lại 1
4. A nhấn âm 3 còn lại 2
5. D nhấn âm 2 còn lại 1

II/
1. destruction
2. pollution
3. conservation
4. constantly
5. erosion
6. defence
7. eliminated
8. circulation
9. disappearance
10. endangered

III/

1. I was introduced to Dr Felix last year.

2. Large areas of forest are being destroyed every day.

3. The land next to our house has been bought.

4. The accident had already been reported before I phoned.

5. The tennis court was being used, so we couldn’t play.

6. Videos like this one can be bought anywhere.

7. You will be told when you should go in to see the doctor.

8. Have you been shown what to do?

9. The hotel should be finished/should have been finished by the time you arrive.

10. The history of the European Community has to be written one day.

11. I wasn’t told that George was ill.

12. An unexploded bomb has been found in Herbert Square and the area is being evacuated.

13. The case is being opened again because they’re not satisfied with the verdict.

14. Better results are expected soon.

15. When are the results of the contest going to be announced?

Ex2/

1. New employees are always welcomed by the manager.

2. Janet was given a present by her colleagues when she retired.

3. The phonograph was invented by Thomas Edison in 1877.

4. An armchair which can play music has just been invented by Stephen Court.

5. Where will you be sent by your company next year?

6. During the recession people were being made redundant by the firm almost every week.

7. Had the package been delivered by a special messenger before you got to the office?

8. The concerts are usually held at the university by the students.

9. The problem is being carefully studied by the scientists.

10. Two children were found in the forest by the police.