A
How does it happen that some people never have to see the doctor while some are wasting much money in hospital？The answer lies in their proper，healthy diet.A balanced diet actually means eating all kinds of foods to provide the body with all the nutrients (营养物) it needs for its daily work.It means eating the right type of foods and eating a right amount of food for each meal.
Each food group contains different kinds of nutrients，and our body surely needs all of these，but in different amounts，and it differs from person to person.When it comes to going on a healthy diet，one size is not suitable for all.Everyone leads a different lifestyle，and has different jobs and fitness levels.
A balanced diet matters for everyone.If the body gets all the required nutrients，it'll improve the immune(免疫) system，which prevents all kinds of diseases.A balanced diet would also be good for the state of mind and then help you remember something better.What's more，if the body is supplied with all the necessary nutrients，the skin and hair also become healthier.A balanced diet also prevents our body from aging.As a result，you'll have a more youthful look.
However，for a healthy body，a balanced diet is not enough；it has to be combined with the proper amount of sleep and exercise.These three things，when included in your daily routine，will make sure that you not only have a healthy body but also a healthy mind.So，go ahead and adopt a healthier lifestyle!
【语篇解读】 本文是一篇说明文，主要介绍平衡饮食的定义和重要性。
1．Why is the question raised in the first paragraph?
A．To show problems. B．To give evidence.
C．To list some facts. D．To lead in the topic.
D [推理判断题。第一段首先提出问题，然后给出答案，紧接着对答案进行阐述。文章其余部分都围绕该答案而展开，由此可推断，第一段提出问题是为了引出话题。]
2．What does the underlined word “differs” in Paragraph 2 mean?
A．Comes. B．Grows.
C．Changes. D．Matters.
C [词义理解题。根据第二段可知，不同的人对不同营养物的需求量也不同，即这个需求量在不同的人之间是有变化的。]
3．What is Paragraph 3 mainly about?
A．The choice of a balanced diet.
B．The features of a balanced diet.
C．The importance of a balanced diet.
D．The relationship between diet and aging.
C [段落大意题。该段首句为主题句，再结合接下来的介绍可判断该段旨在介绍平衡饮食的重要性。]
4．What can we infer from the last paragraph?
A．A balanced diet doesn't work alone.
B．Mind is closely linked to the body.
C．Exercise is the most important.
D．It's easy to get a healthier lifestyle.
A [推理判断题。根据末段首句可推断出，仅仅靠均衡饮食还不够，还需要与适量的睡眠和运动相结合。]
