题一：
The children __________ lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.
A. must have got B. must get C. should have got D. should get
题二：
—Why are your eyes so red? You _______ have slept well last night.
—Yeah, I stayed up late writing a report.
A. can’t B. mustn’t C. needn’t D. won’t
题三：
I ________ myself more—it was a perfect day.
A. shouldn’t have enjoyed B. needn’t have enjoyed
C. wouldn’t have enjoyed D. couldn’t have enjoyed
题四：
—You needn’t take an umbrella. It isn’t going to rain.
—Well, I don’t know. It _________ do.
A. might
B. need C. would D. should
