Question

【题目】Before Liam crossed the street, he stood watching for the traffic ________ to change.

A. signal B. sight

C. rule D. post

Answer 1

【答案】A

【解析】考查名词辨析。句意：Liam在穿过街道前，他站着等交通信号灯改变。A. signal信号；B. sight视野；C. rule规则；D. post职位。根据语境，故选A。