单项选择题

Mr. Black didn't come to office yesterday. He ______ ill.

A．can be
B．must be
C．must have been
D．would be
<上一题 目录 下一题>
热门 试题

单项选择题
______ among the peasants for many years, he knew them very well.
A．Working
B．Having worked
C．To worked
D．Being worked
单项选择题
Why don't you put the meat in the fridge It will ______ fresh for several days.
A．be stayed
B．stay
C．be staying
D．have stayed
相关试题