He bought some school things
A on one's way home
B on the way to home
C on his way to home
D on his way home
选项是D.
因为A on one's way home 其中one's指代不明.D on his way home其中his指代主语He.
又因为B on the way to home 和 C on his way to home中的home是副词,前面不需要用介词.