单项选择题

A______component of any democracy is a free labor movement.

A．vital
B．visual
C．sole
D．single
<上一题 目录 下一题>
热门 试题

单项选择题
It is important for university to keep______with the changes in science and technology.
A．step
B．stage
C．pace
D．space
单项选择题
A cream sauce is the perfect______to this dessert.
A．complement
B．supplement
C．element
D．permanent
相关试题