39．The students have been told that under no conditions ____________________ (他们可以用)the mobile phone in class．(use)

38．The number of people in the world totals about 6 billion and large quantities of waste ____________________ (产生)each year．(produce)

37．It is not just the size of the Olympic Games ____________________ (使它们)unique, but what they mean to us．(make)

36．We rent a beach house with two small rooms, the smaller ____________________ (可以用作)a kitchen．(serve)

35．Why are you still working on this project? It’s 4 o’clock in the afternoon and you’re supposed ____________________ (完成)it by noon．(finish)

34．I have already told you that I’m going to buy it, ____________________ (不管它花多少钱)．(cost)

33．The other day a warm thought suddenly ____________________ (我想到)I might use the pocket money to buy some flowers for my mother’s birthday．(come)

32．–It was a red light, William．You ____________________ (应该停)the car．

　 –Sorry．I didn’t see it．(stop)　

31．–Have you thought about your day off next week?

　 –Oh yes, I ____________________ (在享受)the sunshine in Hawaii next Friday afternoon while you’re all working! (enjoy)