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Ex1

1 prevent

2 environment

3 recycle

4 affects

5 harm

6 caused

7 issue

8 health

9 burned

10 coughed

11 damade

12 lung

13 disease

14 pollution

15 heart

Ex2

1 polluted

2 healthily

3 Prevention

4 environmentally

5 reduction

6 saving

7 harmlessly

8 electrician

9 poisonous 

10 protection

11 wasteful

12 tourism

13 organized

14 removement

15 cleaner

6. A

7. A

8. D

9. B

10. A

11. C

12. C

13. D

14. C

15. A

6 A

7 A

8 D

9 B

10 A

11 C

12 C

13 D

14 C

15 A

 Little Whale = Cá voi nhỏ

Sample Drawing = Bản vẽ mẫu

Magnetic Drawing Board = Bảng vẽ bằng nam châm

All Progams = Tất cả chương trình

Excel = Giỏi tuyệt,...

Windows Explorer = Windows thám hiểm

Center = Trung tâm,...

6

Gà ác

gà ác

1 - D 

2 - C

3 - B

4 - D

5 - A

1 D

2 C

3 D

4 B

5 C

1- B 

2 - C 

3 - C 

4 - A 

5 - B 

6 - D 

7 - A 

8 - C 

9 - A 

10 - B

1 B

2 B

3 D

4 A 

5 B

6 C

7 D

8 D

9 C

10 A

1. can have => could have

2. When => While

3. hardly => hard

4. are practicing => is practising

5. are all so => are all so

6. chemical => chemistry

7. didn't => not to

8. all => both

1 can have => could have

2 when => while

3 hardly => hard

4 are practicing => is practicing

5 are all so => are so

6 bỏ it

7 didn't => not to

8 all => both

1. Strict measures are going to be taken to control the situation.

2. The thieves are believed to have left the country.

3. There have been dramatic improvements in the school facilities in the last three years.
4. It would be beneficial to build a skytrain system in the city. 

5. I'm looking forward to the weekend.

6. It was not until I dealt with it that I realized how difficult it was.

7. As soon as we arrived at the college, we contacted the professor.

8. The last exhibition was not so interesting as this one.

9. But for the internet, we wouldn't interact with other people in real time.

10. Tim promised his sister that he would help her with her work the following day.

1 Strict measures are going to be taken to control the situation

2 The thieves are believed to have left the country

3 There have been a lot of improvement in the school facilities within the last three years

4 It is beneficial to build a skytrain system in the city

5 I am looking forward to the weekend

6 It was not until I dealt with it that I realized how much difficult it was

7 As soon as we arrived at he college, we contacted the professor

8 The last exhibition is not as interesting as this exhibition

9 But for the internet, we couldn't interact with other people in real time

10 Tim promised to help his sister with her housework the day after