题干
In order to keep healthy,we'd better every day．
A：take exercise
B：eat fast food
C：watch cartoons
D：study English
答案(点此获取答案解析）
A
In order to keep healthy,we'd better every day．
A：take exercise
B：eat fast food
C：watch cartoons
D：study English
，
，则集合
=（ ）