海南文昌旅游:in the river 和 on the river 有什么区别?

in the river 和 on the river 有什么区别? on the river? in the river? on June 5th和in June the village is a on the river in the 70th 和 in the 70's 的区别？ A young man was swimming the river. He saw a fat man in th w------- near bank looking at a big dog. in the bus 和 on the bus 的区别 in the ground 和on the ground的区别 on the street和in the street的区别 in the street 和 on the street 有什么区别？