冠词应用哪一个?on the bus 还是on a bus?

冠词应用哪一个?on the bus 还是on a bus? get on the bus还是get the bus on 是on the bus还是in the bus 乘坐公交车是on a bus 还是in a bus get on the bus i often go to school 是 on a bus 还是in the bus 是in the bus ,in the train还是on the bus ,on the train? on bus stop 还是 in bus stop ,at bus stop 对We go to the zoo on a bus提问.划线部分是on a bus ride home on the bus WHEELS ON THE BUS怎么样 Get On The Bus 歌词