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 childrens leisure time?
改进: Who is the proper person to plan childrens 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.