40．If ____________________(有) no water on the earth, there could be no living things．(be)

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)