单项选择题

Scientists ______ that there is no animal life on Mars.

A．ensure
B．assure
C．resume
D．assume
<上一题 目录 下一题>
热门 试题

单项选择题
We'll have to ______ to the idea even though we don't like it.
A．allow
B．approve
C．accept
D．agree
单项选择题
Maggie ran back to the kitchen, eggs______ carefully in her hands.
A．to be held
B．held
C．were held
D．holding
相关试题