单项选择题

We must _________ that the procedure is followed as rigidly as possible.

A．secure
B．ensure
C．assure
D．issue
<上一题 目录 下一题>
热门 试题

单项选择题
I'd rather you _________ anything about it for the time being.
A．do
B．didn't do
C．don't
D．didn't
单项选择题
During the rush hours, a policeman directs traffic at the intersection, and _________ there have been no accidents.
A．as of now
B．to the present
C．up until currently
D．so far
相关试题