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.
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