Question

【题目】The traffic lights (交通灯) have three colors. They are .
A.blue, red and pink
B.red, yellow and green
C.red, yellow and black
D.red, white and green

Answer 1

【答案】B
【解析】交通指示灯的颜色是红黄绿，故选B。句意是：交通灯有三种颜色，它们是红色，黄色和绿色。