The policeman the traffic to move forward after the traffic light turns green.A. leads t

问题补充：

The policeman the traffic to move forward after the traffic light turns green.

A. leads to

B. signals to

C. asks for

D. informs of

答案：

A. leads to

(答案→)B. signals to

C. asks for

D. informs of

解析：signal to意为“给……发信号；示意”；lead to意为“导致”；ask for意为“请求”；inform of意为“通知；告诉”。