60. -I posted the letter a week ago.

　 -Then they __________ the letter by now. It usually takes four days.

　　　 A. can have received　　　　　　　　　　　　　 B. must receive

C. should receive　　　　　　　　　　　　　　　　 D. ought to have received

59. -Look, John’s fallen asleep.

　 - Oh, he _______ too late last night.

　　　 A. might sit up　　　　　　　　　　　　　　　　　 B. should have sat up

C. could sit up　　　　　　　　　　　　　　　　　　　　　 D. must have sat up

58. I lived with my sister this summer and didn’t have to pay rent. So I ______ save most of my salary.

　 　　 A. could　　　　　　 　　　　　　　　　　　 B. would

C. was able to　　　 　　　　　　　　　　　　 D. should

57. -You’d better keep quiet in class.

　 -Sometimes I ________ Yesterday, I was very quiet during my English class.

　 　　 A. would　　　　 　　　　　　　　　　　　　 B. do

C. did　　　　　　　 　　　　　　　　　　　 D. have

56. On Sundays when I was a child, Father and I _______ get up early and go fishing.

　 　　 A. could　　　　　 　　　　　　　　　　　　 B. would

C. might　　　　　 　　　　　　　　　　　　 D. should

55. -Would you be here to attend the English party this evening?

　 -Yes, we _________.

　 　　 A. shall　　　　　　 　　　　　　　　　　　 B. would

C. will　　　　　　　 　　　　　　　　　　　 D. must

54. It’s said that there are plenty of hotels in that town. There ______ be any difficulty for you to find somewhere to stay.

　 　　 A. wouldn’t　　 　　　　　　　　　　　　　　 B. mustn’t

C. shouldn’t　　　　 　　　　　　　　　　　 D. needn’t

53. -Why didn’t you attend the lecture yesterday?

　 -I didn’t think that we _______ on Sundays.

　 　 A. should　　　　　 　　　　　　　　　　　 B. ought to have

C. shouldn’t have　　 　　　　　　　　　　　　 D. will have to

52. -You didn’t invite Bill?

　 - __________ him too?

　 　 A. Must I invite　　　　　　　　　　　　　　　　 B. Must I have invited

C. Should I invite　　　　　　　　　　　　　　　 D. Should I have invited

51. The thief ________ in from the kitchen window as the door was closed.

　 　 A. may climb　　　　　　　　　　　　　　　　　　 B. must have climbed

C. could have climbed　　　　　　　　　　　　 D. should have climbed