Walk along this street and the book shop is on your left .

问题描述:

Walk along this street and the book shop is on your left .
A.in B.on
C.by D.to 我知道正确答案是B,但是能否说出原因?
空格后面多打了一个on

描述物体在左边(left)或在右边(right)的介词是on