_________with the size of whole earth,the highest mountain does not seem high at all

问题描述:

_________with the size of whole earth,the highest mountain does not seem high at all
compared 不太明白为什么选+ed 的,主语是动作的承受者就用过去分词吗?那其他情况选什么?

因为主语不是人,而从句的主语是山.
当分句的主语和主句一样时,就可以省略掉,所以when分句完整的应该是:
When it is compared with the size of the whole earth
如果帮到了您望采纳.:)