文章大意：本文讨论了如何保持健康：合理的饮食；充足的睡眠；适当的锻炼。这是三大法宝。
1．According to the passage, ________.
A．we should always keep fit
B．if we were healthy, we could spend our days in doing things with less sleep
C．one can eat a lot to stay in good shape
D．one needn't take any exercise if he is healthy
答案：A 细节理解题。根据文章第一句Good health is the most valuable thing a person can have, but one cannot take good health for granted.说明健康是一个人最重要的东西，故A正确。
2．In order to keep good health, ________.
A．we should eat a lot of sweets
B．one needs a large amount of fat
C．people should eat according to the foods nutrition
D．we must try to sleep now and then
答案：C 段落大意题。根据文章第二段内容可知我们一定要吃合适的食物，要按照营养学的规律，要把肉类的蔬菜水果搭配在一起。故C正确。
3．Eating more and sleeping less ________.
A．can keep healthy
B．is no good for you
C．gets you more energy
D．will keep your personality
