X.

33. Public transport should be used more often (phương tiện công cộng nên được sử dụng nhiều hơn).

34. Our character are not the same (những nhân vật của chúng tôi không giống nhau)

35. He has worked in that factory for 5 years (anh ấy làm việc ở công ty đó được 5 năm rồi).

36. Although the tickets are expensive, many people enjoyed the program (although + mệnh đề).

37. There is a shortage of clean water in this in this country (Có 1 sự thiếu thốn về nước sạch ở vùng quê này)

38. Children living in slums often suffer from malnutrition (trẻ em sống trong các khu ổ chuột thường suy dinh dưỡng)

39. Overpopulation is a serious problem, isn't it? (Câu hỏi đuôi) 

40. There is less air pollution and traffic in the countryside (less+danh từ không đếm được)

33. Public transport should be used more often.

34. Our characters are not the same.

35. He has worked in that factory for 5 years.

36. Although the tickets are expensive, many people enjoyed the program.

37. There is a shortage clean water in this country.

38. Children living in slums often suffer from malnutrition.

39. Overpopulation is a serious problem, isn't it?

40. There is less traffic and air pollution in the countryside.

@Meo_Ngok