题干
Some children prefer to eat junk food ________ it's not good for their health.
A：although
B：if
C：as
D：when
答案(点此获取答案解析）
A
Some children prefer to eat junk food ________ it's not good for their health.
A：although
B：if
C：as
D：when
的解集非空的一个必要而不充分条件是（ ）