单项选择题

Between 1890 and 1970 the monetary costs of supplying energy _____ more or less constant or declined.

A．to stay
B．was stayed
C．stayed
D．has stayed
<上一题 目录 下一题>
热门 试题

单项选择题
The reward was not always given to everyone, nor _____ to those who deserved it most.
A．it was not given
B．was given
C．it was not given nor
D．was not it given
单项选择题
______ retire are still able to receive pension that they have paid into the social security system during their working days.
A．Most people
B．since most people
C． Most people are
D． Most people who
相关试题