Regular exerciseour health；that is to say，our health canit.A. benefit； benefit fromB. is o

Regular exercise our health；that is to say，our health can it.
A. benefit； benefit from
B. is of benefit to；benefit from
C. is good for；benefit
D. benefits； are benefited from

A. benefit； benefit from(答案→)B. is of benefit to；benefit fromC. is good for；benefitD. benefits； are benefited from解析：考查词组： Benefit做动词用，benefit sb使某人受益，benefit from从…中受益，benefit做名词用，可以用be of benefit to sth对…有益，be good for对…有好处，根据句意：定期锻炼对健康有益，也就是说我们的健康可以从中受益。第一空可以填;benefit、be of benefit to ，be good for，但A项bendfit和主语Regular exercise不一致，可以排除，第二空应该填“benefit from”CD都不对。选B。

就是这个解释