with the size of the whole earth, the highest mountain does not seem high at all.
A. When pared
B. While paring
C. Compare
D. Comparing
网友回答
(答案→)A. When pared
B. While paring
C. Compare
D. Comparing
解析：考查状语从句的省略式，英语中如果主从句的主语一致，可以省略从句的主语和be动词，When pared = When the highest mountain is pared，句意：当和整个地球的大小比的时候，最高的山似乎一点不高。选A。