31. I am not good at maths, but English

改进: I am good not at mathematics but at English/ My strength is not mathematics but English.

32. Who is the proper person to make up his minds about children’s leisure time?

改进: Who is the proper person to plan children’s leisure time?

33.It is children who clear about their interests.

改进: It is children who are clear about their own interests.

34. I agree the latter idea.

改进: I agree with the latter idea.

35. Many people dissatisfy with the status quo.

改进: Many people are dissatisfied with the status quo.

36. So I feel breathe more comfortably now.

改进: So I feel more comfortable now when I breathe.

37. People should learn knowledge no matter how old they are.

改进：People should learn no matter how old they are/ People are never too old to learn.

38. No one knows all the things.

改进: No one knows everything.

39. I want to live in a quiet place to admire peaceful life.

改进: I want to live in a quiet place to enjoy peaceful life.

40. Each form ofshavingsfriends has its advantages.

改进: Each way of choosing friends has its advantages.