Question

They thought __________ important to look right and left when ________ the road.

A. it’s; cross B. it; to cross

C. it; crossing D. it was; to cross

Answer 1

C

【解析】

试题分析：句意：他们认为当过马路时左右看是重要的。此处it作为形式宾语，to look right and left作为真正主语。When引导的状语从句的主语和谓语与主句的主语和谓语相同时，省略主语和谓语。When they are crossing the road=when crossing the road。故选C。

考点：考查省略句的用法。