句型：We must wait for the green light. — 英语选择题
题目
放学时，安安和同学来到路口。路上暂时没有车，但信号灯还是红色。同学想马上过马路，安安应该说哪句话？A. We must wait for the green light. B. We must wait for the red light. C. We must walk on the green light. D. We must wait at the bus stop.