◎ 题干
Doctors say that exercise is important for health, but it _____ be regular exercise. 
[     ]
A. can
B. will
C. must
D. may
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“Doctors say that exercise is important for health, but it _____ be regular exercise. [ ]A. can B. will C. must D. may…”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。