Doing morning exercise?good for our health 填is还是will be

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Doing morning exercise?good for our health 填is还是will be
Doing morning exercise?good for our health 填is还是will be

Doing morning exercise?good for our health 填is还是will be
is 表示客观事实的,一般都用现在时态.

is 动名词作主语 在陈述客观事实,一般现在时就可以