We all know that doing morning exercises . A. is good for our healthyB. are good for our h

问题补充：

We all know that doing morning exercises .

A. is good for our healthy

B. are good for our healthy

C. are good for our health

D. is good for our health

答案：

A. is good for our healthy

B. are good for our healthy

C. are good for our health

(答案→)D. is good for our health

解析：for后面健康应为名词，抽象事物一般用单数形式，所以选D。