over across through的区别求事例.还有如果是这道题应该怎么填.The Great Wall travels_____deep valleys,_____deserts and _____mountains.

问题描述:

over across through的区别
求事例.
还有如果是这道题应该怎么填.
The Great Wall travels_____deep valleys,_____deserts and _____mountains.

over
through
across

through
across
over