问题 选择题

Private cars are required to take turns off roads one out of five weekdays ____the traffic pressure.

A.relieve(缓解)

B.to relieve

C.relieving

D.relieved

答案

考察不定式用法。本句中的不定式做目的状语,指为了缓解交通压力,私家车轮流上路。故A正确。

单项选择题
单项选择题