Chào em. Em tham khảo đáp án dưới của chị nhé :))) 

Bài 1:

1,B

2,B

3,A

4,C

5,C

Bài 2:

1,the most expensive

2,more ibtelligent

3,the most boring

4,the most dangerous

5,the most unforgettable

6,the narrowest

Bài 3:

1,She is the most attractive in the contest

2,No country in Asia is more polluted than China 

3,This test is the most difficult I have ever done 

4,I have never tasted such a delicious drink 

1. B

2. B

3. A

4. A

5. B