II. Choose the correct answer A, B, C or D to complete the passage.

People need to breathe. If they don’t breathe, they (1) ____________ die. But how clean is the air people breathe? If they breathe (2) ___________ air, they will have breathing problems. Plants and animals need (3) __________ air too. A lot of the things in our lives create harmful gases and (4) _________the air dirty, like cars, motorbikes, and factories. Dirty air is called polluted air. Air pollution can also make our Earth warmer.

1. A. must B. are C. will D. won’t

2. A. fresh B. clean C. cleaner D. dirty

3. A. clean B. safe C. dirty D. polluted

4. A. get B. make C. give D. made

Đề bài; Hoàn chỉnh các câu sau

1. If the air / in / city / be / polluted / , / it / can / cause / people's / respiratory / problems

2. If / smog / be / frequently / formed / in / city / , / it / cause / difficulty / in / breathing / headache / even / lung caner

3. If / carbon monoxide / concentrate / in / great/ amounts / , / it / be / harmful

4. the climate / change / if / more trees / be / cut / down / for / hardwood

5. If / we / not / control / pollution / soonn / , / it / be / too / late

6. If / we / not / protect/ frontier / , / we / suffer / many / from / natural / disasters

Đề bài; Hoàn chỉnh các câu sau

1. If the air / in / city / be / polluted / , / it / can / cause / people's / respiratory / problems

2. If / smog / be / frequently / formed / in / city / , / it / cause / difficulty / in / breathing / headache / even / lung caner

3. If / carbon monoxide / concentrate / in / great/ amounts / , / it / be / harmful

4. the climate / change / if / more trees / be / cut / down / for / hardwood

5. If / we / not / control / pollution / soonn / , / it / be / too / late

6. If / we / not / protect/ frontier / , / we / suffer / many / from / natural / disasters

II. Viết dạng đúng của từ để hoàn thành các câu sau đây. (10ms)

Dạng viết lại câu với hiện tại hoàn thành:

21. This is not the first time we have visited this city.

→ This is not our ... . 

22. This is the second time I have seen this movie.

→ I have ... .

23. This is the second time he have been to a tennis match.

→ He has ... .

24. She started doing the homework as soon as she got home.

→ She has ... .

25. He started his career as a teacher 20 years ago.

→ He has ... .

26. Is this your first visit to our country?

→ Haven't you ... ?

27. The last time we contacted was 3 months ago.

→ We haven't ... .

28. It is a long time since I last wrote to her.

→ I haven't ... .

29. When did you start to wait for the bus?

→ How long have ... ?

30. This is the second time I have stayed in this hotel.

→ I have ... .

31. He last send me postcards when he was in Paris.

→ The last time ... .

→ He hasn't ... .

32. The haven't visted their hometown since they were 12.

→ They last ... .

33. This is the first time she has read such a romantic novel.

→ She hasn't ... .

34. We began to talk two hours ago.

→ It's two hours ... .

35. My father stared to work as an enguneer when he was 22.

→ My father has ... .

VI. Viết lại câu sau sao cho ý nghĩa không đổi bắt đầu với từ đã cho. (2ms)

1. Do you have a cheaper computer than this?.

Is this...........................................................................................?

2. The new refrigerator is bigger than the old one.

The old refrigerator............................................................................

3. She is a good badminton player.

She plays..........................................................................................

4. My brother likes playing soccer better than watching TV.

My brother prefers..............................................................................

5. We have a two-month summer vacation.

Our summer vacation lasts....................................................................

6. You shouldn't go there alone.

You had.....................................................................................

7. What is you daughter's age, Mrs Nga?

How........................................................................................?

8. I spend two hours doing my washing every day.

It takes........................................................................................