Who did you meet on your way _______
_ home,Helen?
A.at B. to C. in D. /
Who did you meet on your way ________ home,Helen?
A.at B. to C. in D. /
D on one’s way to 意为“在某人去……的路上”，后面接地点副词时省略to。此处home是副词，故选D。