____enough exercise is good for our healthA,Taking,B,To take 为什么选那个
问题描述：
____enough exercise is good for our health
A,Taking,B,To take 为什么选那个
答
A
动名词做主语.
虽然动词不定式也可以作主语,但一般都要和形式主语连用的,比如：
It is useful for us to learn English.