to the left, and you will see the railway station.

         A．Turning                B．To turn                          C．Turned                      D．Turn

          to the left, and you will see the railway station.

       A．Turning    B．To turn     C．Turned     D．Turn

__________ to the left at the crossroads, and you will see the railway station on your right.

A．Turning           B．If you turn         C．Turn             D．Having turned