为什么是 walk over the mountain

为什么是 walk over the mountain walk in the mountain Over The Mountain 歌词 walk over是穿过；走到另一地方,那为什么接water时,加to,即walk over to the sea? the students are___a walk in the mountain cross over mountain 和through the mountain 有什么区别? 用walk across the bridge还是walk over the bridge? walk across the bridge还是walk over the bridge? they are walking over the bridge为什么walk要加ing? walk sb.over to the hospital是什么意思? walk over the mountains正确吗 为什么是class is over 不是the class is over