1. The environment in the city is much polluted than that in the countryside. 

-> more

2. In the countryside, houses are often little furnished and bigger than those in the city. 

-> less 

3. The communication system in the countryside become more modern in the last ten years because electricity is available in more places.

-> place

4. I prefer live in the countryside than in the city, people are normally healthier and fitter.

-> living

5.50 years ago, farmers depended more heavy on the weather than at present.

-> heavily

6. I'm not sure about what we should to do

-> do

7. Are we going to must work overtime again this week?

-> have to

8. We have many things to do this week, so I don't know if I can't go to English class.

-> couldn't

9. I have to thought about the problem for a while, but I finally figured it out.

-> think

10. You should quiet in class; otherwise, your classmates can't concentrate.

-> be quiet

Đáp án:

3 places=>place

4 live=>living( cấu trúc prefre...than)

5 heavy=>heavily(do có động từ depended)

6 to do=>do(cấu trúc shuold + V)

7 must=>have to(vì must được dịch là “phải”,  diễn tả một sự bắt buộc hoặc một mệnh lệnh còn have to diễn tả nghĩa “phải” do xuất phát từ chủ quan người nói)

8 can't=>can(cái này bạn dịch nghĩa ra nhé:))))

9 thought =>think( sau have to là model V)

10 quiet=> be quiet

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