单项选择题

These planes are designed to travel at ______ speeds.

A．sounding
B．fatal
C．supersonic
D．soaring
<上一题 目录 下一题>
热门 试题

单项选择题
Language learning usually ______ conscious imitation.
A．inspires
B．enriches
C．necessitates
D．stimulates
单项选择题
My friend was gone ______ after staying in the same house for over six months.
A．for good
B．for all
C．on end
D．on the spot
相关试题