bridge on /over the river ,用哪个词?

bridge on /over the river ,用哪个词? they are walking over the bridge 为什么不用on the bridge the bridge is ()the river.A on B over 另请教on和over 的区别? on the bridge 意思 Look!there is a bridge( )the river.A.over B.below C.on D.under there is no bridge over the rievr,we have to go a_____it on a boat There is a bridge ( ) the river.A.on B.over C.in D.at Can you see a bridge( ）the river?A.on B.over C.adove walk across the bridge还是walk over the bridge?walk across the bridge正确还是walk over the bridge正确? They are walking over the bridge.请问over表示在.之上 那on呢?什么情况用on什么情况下用over呢? 英语的on和over的区别是什么?新概念一33课里有一句They are walking over the bridge.over为什么不是on? snow on the broken bridge The bridge is over the rive over在这里是什么意思 会英语的大师来帮帮忙,They are walking over the bridge.中ov会英语的大师来帮帮忙,They are walking over the bridge.中over换成on可以吗 they are walking over the bridge 为什么不用'on the bridge' on 在....上面 与物体接触了 over 在...之上 不与物体接触 难道人在桥上走不用与桥面接触地吗？ There is no bridge over the river but we can cross it on a r____.根据首字母填空 Zhejiang will build a bridge the Qiantang River.A.over B.on C.across D.above E.t Another bridge ______ the river.A will be built on D is being built over 选哪个