单项选择题

China is one of the few countries in the world that have devoted great efforts to ______ world peace.

A．preserving
B．conserving
C．possessing
D．reserving
<上一题 目录 下一题>
热门 试题

单项选择题
Did you go to Belgium last year when you were on a business trip to Europe No, ______ there
A．I have never gone
B．I never did
C．I've never been
D．I never was
单项选择题
Cats sleep ______ day and hunt ______ night.
A．in, in
B．at, at
C．during, during
D．by, by
相关试题