Sichuan is ______the southwest of China.(A.in B.to C.on)

问题描述:

Sichuan is ______the southwest of China.(A.in B.to C.on)
我还想知道in ,to ,on的区别,

A.in
in是在管辖范围内,to是不接壤不管辖,on是接壤但不管辖.