( ) 31. Teachers and students ______ look coldly at you for a day or two, but there are friendly feelings in their hearts.

　　A. must B. can C. may D. should

　　( ) 32. Cars and buses ______ stop when the traffic lights turn red.

　　A. can B. need C. may D. must

　　( ) 33. –Do you think his story ______ true? --I don’ think so. But it sounds good.

　　A. must be B. may be C. can be D. has to be

　　( ) 34. Look out! The knife is very sharp. You ______ cut your finger.

　　A. need B. must C. should D. may

　　( ) 35. –How long ______ the book be kept?

　　--For two weeks, but you ______ return it on time.

　　A. can; may B. may; need C. can; must D. must; need

　　( ) 36. – May I have an apple, Mum?

　　--Certainly. But you ______ wash your hands first?

　　A. may B. must C. can D. need

　　( ) 37. –There is a lot of smoke coming out of the teaching building there.

　　--Really? It ______ be a fire, most probably.

　　A. can B. ought to C. may D. must

　　( ) 38. –Shall I tell John about the bad news?

　　--No, you ______. I think that will make him sad.

　　A. needn’t B. wouldn’t C. shouldn’t D. mustn’t

　　( ) 39. –Could I call you by your first name? --Yes, you ______.

　　A. will B. could C. may D. might

　　( ) 40. –Let’s go to the cinema, shall we? -- _______.

　　A. No, I can’t B. Yes, I will C. Yes, thank you D. No, we’d better not

　　( ) 41. --______ the man there be our new teacher?

　　--He ______ be, but I’m not sure.

　　A. May; mustn’t B. Can; may C. Must; can’t D. Can; can’t

　　( ) 42. –Sometime is knocking at the door. Who ______ it be?

　　--It ______ be Tom. He is still in the school.

　　A. can; can’t B. can; mustn’t C. might; could D. might; may