____ with the size of the whole earth,the highest mountain does not seem high at all.

题目

____ with the size of the whole earth,the highest mountain does not seem high at all.
A.when compared B.While comparing C.compared D.Comparing
为什么答案是C?A错在哪里?

答案

因为若选A,主语变成人了,而从句的主语是山,不符.