问题

15.—Tom is never late for work. Why is he absent today?—Something ________ to him.
A:must happen
B:should have happened
C:could have happened
D:must have happened
B:should have happened
C:could have happened
D:must have happened
正确答案是:
同类题型
Will you please give thedictionary to Jane—Sure. I’ll give it to her shearrives here.
Have our working conditions improved? —No, ______than before, I’m afraid.
Three-fourths of the homework _____today.
The storm came so suddenly, otherwise they ______ such great loss when it struck.
____Jack was a little disappointed, he still went on with his work.