单项选择题

This is one of the most ______ ways of reducing pollution.

A．effective
B．efficiency
C．effect
D．efficient
<上一题 目录 下一题>
热门 试题

单项选择题
His latest works have really ______ his reputation as a writer.
A．expressed
B．established
C．estimated
D．ensured
单项选择题
She's come already, ______
A．doesn't she
B．isn't she
C．hasn't she
D．is he
相关试题