常用in、on、at作介词开头的词组答:in(on) the bus, in(on) the street,on on board (在船上) on camera(出现在电视上), on campus, on deck(在甲板上), on earth, on high(在高处), on land, on the bank, on the beach, on the borders, on the ceiling, on the coast, on the committee, on the corner(在拐...