..有点慌...填介词..The aeroplane is flying ---- the village.The sh

..有点慌...
填介词..
The aeroplane is flying ---- the village.
The ship is going ----- the bridge.
The boy is swimming ----- the river.
Two cats are running ----- the wall.
My books are ----- shelf.
The bottle of milk is ---- the refrigerator.
The boy is jumping ------branch.
Mary is sitting -----her mother and her father.
It is 9 o'clock.the children are going --- class.
It is 4 o'clock.The children are coming -----
class.