To turn to the left,you could find a post office 中为什么要用to do

To turn to the left,you could find a post office 中为什么要用to do could you tell me where finding the post office还是 to find啊? i will go to the post office.Do you have a letter （to post） ___to left,you will find the post office.A.turning B.turn ___(get)to the post office,turn left and cross the road at t ---Do you know the way to the post office?---Yes,follow me a could you please tell me how to get to the post office You'd________go back to the post office. when you get to the post office,( ). ( ) ( ) a post office next to the( turn to the left,and you will see the bus stop.为什么用turn 不用tu ___(Turn) to the left,and you will find the path ___(lead)to