【应用】?
Beijing is one of the __________ central (centre)cities in theworld.? 【4】across prep. on the other side of something such as a street, river, or area在……对面；go from one side of a place or a boundary to the other 穿过， 横穿 Anyone from the houses across the road could see
him. 在路对面的那些房子里的任何一个人都能看到他。?She walked across the floor and lay down on the bed. 她走过地板，躺在了床上。