Doing morning exercises is good our health.A. toB. withC. forD. at

问题补充：

Doing morning exercises is good our health.

A. to

B. with

C. for

D. at

答案：

A. to

B. with

(答案→)C. for

D. at

解析：句意：做晨练对我们的健康有好处。这里考查的是一个固定短语，be good for… 对……有好处；be good at 擅长，在某方面表现好；be good with sb. 对某人友好。根据句意选C。