单项选择题

Please_________from smoking until the aeroplane is airborne.

A．refrain
B．prevent
C．resist
D．restrain
<上一题 目录 下一题>
热门 试题

单项选择题
These people once had fame and fortune; now______ is left to them is utter poverty.
A．all that
B．all what
C．all which
D．that all
单项选择题
It is not so much the language_______the cultural background that makes the book difficult to understand.
A．but
B．nor
C．as
D．like
相关试题