"Where's your home town?" "It is about twenty kilomtres ＿the south of shanghai."A.inB.onC.toD.by应该选哪个?

"Where's your home town?" "It is about twenty kilomtres ＿the south of shanghai."A.inB.onC.toD.by应该选哪个?
"Where's your home town?" "It is about twenty kilomtres ＿the south of shanghai."A.inB.onC.toD.by
应该选哪个?

"Where's your home town?" "It is about twenty kilomtres ＿the south of shanghai."A.inB.onC.toD.by应该选哪个?
in the+方位名词 表示在范围之内
on the+方位名词 表示两地接壤
to the+方位名词 表示在范围之外 （如美国与中国）
on是相邻,to是不接壤,in是在境内