* Bài sửa lỗi sai

1. C -> stay up late

2D are -> were

3D as -> than

4A works ->  worked

5B less ->fewer 

* Rewrite

2. Did a group of foreigners visit the slums last week ?

3. The countryside suffers less pollution than the city

4. Overpopulation causes a lot of social problem in this area , does it ?

5. Shanghai has more skycrapers than Jakarta 

Ex1:

2 Did a group of foreigners visit  the slums last week ?

3 The countryside suffers  less pollution than the city.

4 Overpopulation causes a  lot of social problem in this area , does it ?

5 Shanghai has more   skycrapers than Jakarta .

V: choose the correct answer.

1 b 

2d

3 a

4 b

5 a

6 c

7c 

8c

9 b

10 d

VI : find and correct a mistake in each sentences.

1. c  to stay up -> stay up  .

2 d are ->  were

3 d as ->  than

4 a works ->   worked

5 b less -> fewer 

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