问题
选择题
——Look at your pale face. You ______ a sleepless night.
——You bet. The work site next to the hotel was so noisy.
A．must have had
B．might have
C．should have had
D．cannot have had
答案
答案：A
考查情态动词。must have done过去一定做过某事。句意：看你苍白的脸，你昨天晚上一定没睡好。选A。
