单选题 · 选择一个答案
You are in the left-hand lane at traffic signals. You are waiting to turn left. Which of these traffic signals may you move on?
你正在路口的最左边车道等待信号灯放行左转弯，下面哪一个信号灯亮起的时候你可以左转？
B shows a green left arrow, permitting a safe left turn.
B显示左转绿箭头，允许按箭头方向安全左转。
阅读相关知识
A, C and D still have red left arrows. An arrow applies only to its direction; check the path and pedestrians.
A、C、D仍有左转红箭头，不得左转。绿箭头只允许相应方向，仍须确认路线及行人安全。