单项选择题

It is essential that all these figures ______twice.

A．must be checked
B．be checked
C．is checked
D．will be checked
<上一题 目录 下一题>
热门 试题

单项选择题
He is ______a horse.
A．stronger as
B．as stronger than
C．the strong as
D．stronger than
单项选择题
I think he studies very hard, ______
A．does he
B．doesn’t he
C．don’t I
D．do I
相关试题