Look!Thetrafficlighthasturnedred.We

问题详情：

Look! The traffic light has turned ________ stop our car.

A．can  B．can't  C．must  D．mustn't　

【回答】

C　由前句“The traffic light has turned red.”及常识可知，红灯亮了，必须停车。故选C。

知识点：情态动词

题型：选择题