问题
选择题
30．—Peter looked tired and a little absent-minded at the meeting．
—He _____ up too late．
A．may stay
B．could stay
C．should have stayed
D．must have stayed
答案
答案：D
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30．—Peter looked tired and a little absent-minded at the meeting．
—He _____ up too late．
A．may stay
B．could stay
C．should have stayed
D．must have stayed
答案：D
