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
When he was in his ______, he began to study English.
A．forty
B．forty"s
C．forties
D．forty"s years old
相关试题