问题

Peter looked tired and a littleabsent-minded in class．—He _____ too late．

A:may stay up
B:could stay up
C:should have stayed up
D:must have stayed up

正确答案是：

同类题型

Is it John that is being scolded in themanager’s officeNo. It ______ be him. I saw him on the wayjust now.

You can come here to ask me _____ if you haveany questions.

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The teacher wanted to know __________.