Private cars are required to take turns off roads one out of five weekdays the
traffic pressure.
A. to reduce
B. reducing
C. reduce
D. reduced
网友回答
A. to reduce
B. reducing
C. reduce
D. reduced
解析： 考查非谓语动词。句子没有连词，所以可
以得出该处应用非谓语动词形式，排除C、D两
项；此处用不定式表目的。