问题
选择题
—I’m afraid you missed a fantastic lecture yesterday. How come you were absent from it?
—If you _______ know, I asked for a day off and visited a relative of mine in hospital.
A．might
B．may
C．shall
D．must
答案
答案：D
题目分析：句意：--恐怕你昨天错过了极好的讲座。你怎么会缺席的？--如果你偏要知道，我请了一天假去看完医院的亲戚。Must必须，偏要，may可以，可能，shall应该，将会，所以选D。