问题补充：
I met an old friend of mine my grandparents’ home.
A. on my way to
B. on my way
C. in my way to
D. in my way
答案：
(答案→)A. on my way to
B. on my way
C. in my way to
D. in my way
解析：句意：在去我爷爷家的路上我遇到了一个老朋友。这里是短语on one’s way to sb’s home在去某人家的路上。on one’s way+副词。这里home是名词，故选A。
