What should we do to keep healthy? One important rule is to exercise ___. A.alone B.early C.oftenD.late

问题描述:

What should we do to keep healthy? One important rule is to exercise ___. A.alone B.early C.often
D.late

C 怎样才能保持健康,一个重要的规则就是经常锻炼.【often】