单项选择题

They took______ measures to prevent poisonous gases from escaping.

A. fruitful
B. beneficial
C. sufficient
D. effective
<上一题 目录 下一题>
热门 试题

单项选择题
Next time I go there. I______ them about what has happened recently.
A. ask
B. shall ask
C. asked
D. asks
单项选择题
The mere fact ______most people believe nuclear war would be mad does not mean that it will not occur.
A. that
B. which
C. what
D. whose
相关试题