问题标题：
【Regularexercise____ourhealth.A.isofgreatbenefittoB.willdoalotofgoodatC.issuretobenefitfromD.issaidtobebenefitto86.119】
问题描述：
Regularexercise____ourhealth.
A.isofgreatbenefitto
B.willdoalotofgoodat
C.issuretobenefitfrom
D.issaidtobebenefitto
86.119
高志年回答：
语法中：of+名词=形容词如：Thisbookisofhelptoyourstudy=Thisbookishelpfultoyourstudy.Thisletterisofgreatimportance=Thisletterisimportant所以选项中的：regularexercisei...
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