Question

But often the drivers just go by, taking the human traffic        for granted.

A．sign

B．symbol

C．signal

D．mark

Answer 1

C

试题分析：考查名词：A. sign标志，B. symbo象征，l C. signal信号，   D. mark记号，句意：但是经常司机就是从旁边经过，对人类的交通信号不以为然。选C。