161.A good friend is one who willyou when you are in trouble.

39.It is requested that the rent for the housein advance.

38.It＇s time youhow to behave properly.

37.Without his wise mother, hesuch a successful scientist.

36.It is high time that youthe problem carefully about what you will do in the future.

35.We are all for your proposal that the discussion .

34.I wish youhere last night. All of us were waiting for your arrival.

33.I would rather youto the party with her tomorrow.

32.Ia little earlier, but I met a friend of mine on the way.

31.If he had been in better health, hemore books.

30.One of the requirements for combustion（燃烧）is that the materialto its burning temperature.