C
Today, people want to keep healthy by doing sports and exercise. But some of them have some wrong ideas about it.
"A plate of chicken is a good meal before games because it has much energy."
In fact, the best food before games should have carbohydrates (碳水化合物). Foods like potatoes, bread, bananas have enough carbohydrates, but chicken, duck and beef don't.
"The best time to exercise is early in the morning."
No. Morning is a good time to exercise, but it may not be suitable for you. If an afternoon or evening period (时期) is suitable for you, and you enjoy the feeling of getting healthier, you can choose any time to exercise. So there is no fixed time for you to take exercise.
"If you drink water when you exercise, you'll feel tired."
The fact is that you must have some water during breaks (休息) when you exercise. And after exercising, you must have enough water. If you don't drink enough water, then you may feel tired.
"Exercising every day is quite important."
Wrong. Too much exercise is bad for your health. You need to give your body a day to have a rest.
9. Which of the following is the best food for us to eat before games? ()
A. Duck.
B. Beef.
C. Potatoes.
D. Chicken.
10. What does the underlined word "fixed" mean in Chinese? ()
A. 重要的
B. 固定的
C. 宝贵的
D. 充足的
11. When must we drink water according to the text? ()
A. When we feel tired.
B. Early in the morning.
C. Before we take exercise.
D. During breaks when exercising.
12. What is the best title for the text? ()
A. Facts about Healthy Food
B. Suitable Sports for Most People
C. Best Time for Sports and Exercise
D. Wrong Ideas about Sports and Exercise

9. C 10. B 11. D 12. D

【分析】
本题为英语阅读理解题，需结合原文内容逐一解答各小题：
1. 第9题：题干询问赛前最佳食物，需定位原文中关于赛前食物的描述，筛选符合要求的选项；
2. 第10题：题干猜测“fixed”的词义，需结合前文“可选择任意时间锻炼”的语境推断；
3. 第11题：题干询问锻炼时喝水的时间，需定位原文中关于喝水要求的相关内容；
4. 第12题：题干要求选择最佳标题，需梳理全文核心主旨。
【解析】
9. 根据原文第三段“In fact, the best food before games should have carbohydrates... but chicken, duck and beef don't.”可知，赛前最佳食物是含碳水化合物的，土豆属于这类食物，故选C。
10. 前文提到“you can choose any time to exercise”（可选择任意时间锻炼），说明没有“固定的”锻炼时间，因此“fixed”意为“固定的”，故选B。
11. 根据原文第六段“The fact is that you must have some water during breaks when you exercise.”可知，锻炼休息时必须喝水，故选D。
12. 文章开头点明人们对运动锻炼存在错误观念，随后分四点纠正这些错误，核心围绕运动锻炼的错误观念展开，因此最佳标题为“Wrong Ideas about Sports and Exercise”，故选D。
【答案】
9. C 10. B 11. D 12. D
【知识点】
英语阅读理解、细节理解、主旨大意
【点评】
本文是关于运动锻炼正误观念的阅读理解题，涵盖细节查找、词义猜测和主旨归纳三类题型，要求学生精准定位原文信息，难度适中，能有效考查学生的英语阅读能力。
【难度系数】
0.7