单项选择题

A great deal has been done to remedy the situation.

A．maintain
B．improve
C．preserve
D．protect
<上一题 目录 下一题>
热门 试题

单项选择题
The earth moves around the sun.
A．before
B．round
C．after
D．over
单项选择题
It is obvious that he will win the game.
A．likely
B．possible
C．clear
D．probable
相关试题