问题补充：
Health comes first. We should everyday to .
A. take exercise, keep fit
B. take exercises, keep fit
C. take exercise, keep health
D. take exercises, keep healthy
答案：
(答案→)A. take exercise, keep fit
B. take exercises, keep fit
C. take exercise, keep health
D. take exercises, keep healthy
解析：考查词组：第一空填take exercise，锻炼，exercise表示“锻炼”是不可数名词，第二空填keep fit 和keep healthy都可以，句意：健康第一，我们应该每天锻炼保持健康。选A。
