问题描述：
这题为什么D不行（2）
____ with the size of the whole earth,the highest mountain does not seem
high at all.
A When compared
B While comparing
C Compare
D Comparing
我知道是选A.但为什么D不行?语法上没错吧?
____ with the size of the whole earth,the highest mountain does not seem
high at all.
A When compared
B While comparing
C Compare
D Comparing
我知道是选A.但为什么D不行?语法上没错吧?
问题解答：
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