【www.tuzhexing.com--学历学位】
on top of
on（in）the wall
at at a bookshop
at a distance（在远处）
at that place
at the airport
at the back of
at the base of
at the foot of
at the front
at the gate
at the head of
at the meeting
at the mine（在矿山）
at the party
at the place
at the party
at the place
at the pub
at the rear of
at the seaside
at the station
at the stop
at the top of
at the window
at（in）the cinema
at（in）the library
at（in）the office
at（in）the village
at（on）the weekend
state in in progress（在进行中）
in a dilemma（处于进退两难的境地）
in a hurry
in a tight corner（处于困难中）
in action（在行动中）
in an emergency（处于紧急情况中）in anxiety
in astonishment
in bad mood（心情不好）