31. Neither Bill or his parents()at home.

57、Tom is so talkative. I＇m sure you＇ll soon get tired _______ him.

56、Henry is often seen ________ English aloud every morning in the classroom.

55、We were _______ for half an hour in the traffic and so we arrived late.

54、Neither Jack nor I ________ able to persuade his father to attend the wedding.

53、-Would you like a bag of rice?
-Yes. I have ______ rice at home.

52、Why not ________ boating with us in the park?

51、Of all the students in our class, Betty writes ___________.

50、You _____do that, if you don＇t want to.

49、What will be the population of our country by the end of __________.

48、How many students ________in your class?