câu trả lời:

29. ko biết

30. We would buy a car if it weren't expensive

một đội công nhân sửa đường. 12 ngày đầu sửa được 374m đường , 15 ngày sau sửa được 598m . Hỏi trung bình mỗi ngày đội công nhân đó sửa được bao nhiêu mét đường

4 nhân 18 nhân 25

Task 2 choose the best item among A, B, C or D to complete the sentences:

1........................... makes fish die.

A.water pollution B.deforestation C.air pollution D.soil pollution

2. The robot will....................of the flowers in the garden.

A. take care B. take note C. be careful D. cary

3.  I have a lot of homework,................I can't go to out with you

A. because B. and C. but D. so

4. We might...................wireless TV to watch TV programmes from space

A. have B. to have C. having D. had

5........................the film is late, I will wait to watch it

A. because B. when C. but D. although

6. I want to watch the cartoon ................it is funny and simple.

A. but B. so C. although D. because 

7. They ............ badminton next week

A. will play B.to play C. playing D.plays

8. We will .............our old friends next week

A. meet B. to meet C. meeting D. will meet

9. I will wait to watch the film .................it is late

A. because B. although C. but D.when

10 Walking to school will help ..................air pollution

A. reduce B. reuse C. recycle D. refill

11. If we .............. waste paper, we will save a lot of trees

A. repeat B. recycle C. rewrite D. remark