问题
选择题
——Tom is never late for work. Why is he absent today?
—— Something _____to him.
A．must have happened
B．can have happened
C．must happen
D．can happen
答案
答案：A
考查must表推测，must+have done表示对过去事情肯定的推测。句意：汤姆工作从来没迟到过，为什么他今天没来？他一定出什么事了。故选A。