用适当” 介词 “填空

用适当” 介词 “填空
Go ____ the post office.The supermarket is ___ from the bookstore.

选择
I noticed him ____ me without saying anything this morning.
A.go past  B.went past  C.passed D.past
Just go ____ the street until you ____ the bank.The bookstore is on your left.
A.down;Past  B.up;Past  Calong;Pass  D.of;Pass
请详细说明原因.