Câu 11: A

Câu 12: C

Câu 13: B

Câu 14: A

Câu 15: B

16B

15B

13A

12D

11B

B

C

A

B

B

11.B

12.C

13.A

14.B

15.B

16.A

giúp mik với ạ!!!

Câu 2: B

Câu 3: B

Câu 4: A

15 A

16 D

1C 2B

4 If you aren't alert, you computer will be infected with viruses

5 If we use much pesticide on vegetables, they will become poisonous

9 Because Nam needs to improve his social skills, he attends the activity

11 How about using public buses instead of motorbike 

12 They enjoy protecting the environment unpolluted 

15 Mr Brown was disappointed that his son didn't write to him

Câu 1: Đ

Câu 2: S

Câu 3: S

Câu 4: Đ

Câu 5: S

Chúc bạn hok tốt

1Đ

2Đ

3Đ

4Đ

5S

14. A

15. D

16. C

17. D

19. B

c d d d d