26.The diet and lifestyle of teenagers are often ________headache to adults.But we can help them and advise they should
问题描述：
26.The diet and lifestyle of teenagers are often ________headache to adults.But we can help them and advise they should get more ________by eating the right food and exercising regularly.
A./ ,energy B.the,power C.a,energy D.a ,force
为什么加a
答
a表示的不是一个,而是一种情况