to the left and you will find the post office．A. TurningB. TurnC. To turnD. Turned

问题补充：

to the left , and you will find the post office．

A. Turning

B. Turn

C. To turn

D. Turned

答案：

A. Turning

(答案→)B. Turn

C. To turn

D. Turned

解析：考察非谓语动词.句意:向左转,你就会找到邮局.在祈使句中用原形动词表示祈求命令等语气,结合语境可知选B.