C
It is recommended(推荐）that people get 150 minutes of exercise a week. That means that a person should exercise for about 30 minutes a day, five days a week. Half an hour of brisk（轻快的）walking can easily help someone meet that need. You don't need to walk 30 minutes all at a time to start. An expert recommends that beginners start with three short 10-minute walks. Finally, longer walks will become easier.
One good point of walking is that you do not need special equipment（装备）. You do not even need to go to a special area to walk. Don't have workout clothes to wear? You are lucky because what you are wearing right now is probably perfect for walking.
Many studies show that walking is good for your body. According to a study carried out by Harvard Medical School, brisk walking for 30 minutes can burn over 100 calories（卡路里）. Walking also makes your legs strong. Although it may not seem like it, walking is weight training because your legs carry the weight of your upper body whenever you walk. The study also shows that those who walk at least 20 minutes a day, at least five days a week, have 43% fewer sick days than those who exercise once a week or less. And if they do get sick, they become well sooner.
Walking is good for your mind. Walks can be taken in quiet places like parks and forests. Walking in these areas can help a person feel calm. Going on a daily walk gives your mind a break from the busy time of each day as well. A good walk lets you clear your mind and makes you feel better.
()23. What can we know from the first paragraph?
A. People have trouble finding time to walk.
B. Longer walks may be hard for beginners.
C. Half an hour's walk every week is enough.
D. Walking fast makes the activity enjoyable.
()24. What do the findings of the Harvard Medical School's study show?
A. Walking is better than medicine.
B. Walking has wonderful results.
C. People need to walk at least 60 minutes a day to be healthy.
D. Morning is the right time for people to walk.
()25. What does the last paragraph tell us about walking?
A. It is helpful to one's mind.
B. Walking is good for losing weight.
C. It makes one's body busy.
D. It helps one save much money.
()26. Why does the writer write the passage?
A. To show how often we should walk.
B. To show us what to prepare before walking.
C. To show us the findings of a famous study.
D. To show why walking is great exercise.

23.B 24.B 25.A 26.D

【分析】
本题为英语阅读理解题，需结合原文段落内容逐一分析各题选项：1. 第23题定位第一段，对比选项与原文信息；2. 第24题定位第三段哈佛医学院的研究内容，匹配选项；3. 第25题定位最后一段，提取核心信息；4. 第26题需把握全文主旨，判断作者写作目的。
【解析】
23题：第一段提到“beginners start with three short 10-minute walks. Finally, longer walks will become easier”，说明初学者刚开始长距离步行较难，对应选项B；A选项原文未提及找时间的问题，C选项原文要求每周150分钟（每天约30分钟）而非每周半小时，D选项原文未提步行快让活动愉快，故排除A、C、D，选B。
24题：第三段哈佛医学院研究显示步行可燃烧卡路里、强健腿部、减少病假等，均为步行的良好效果，对应选项B；A选项原文未提及比药好，C选项原文是每天至少20分钟而非60分钟，D选项原文未提早上是合适时间，排除A、C、D，选B。
25题：最后段首句明确“Walking is good for your mind”，说明步行对心理有益，对应选项A；B选项是身体益处（第三段内容），C选项与原文不符，D选项原文未提省钱，排除B、C、D，选A。
26题：全文从身体益处（第三段）、心理益处（第四段）等方面介绍步行的好处，作者写作目的是展示步行为何是优秀运动，对应选项D；A仅为第一段细节，B未提及准备事项，C仅为第三段内容，排除A、B、C，选D。
【答案】
23.B 24.B 25.A 26.D
【知识点】
英语阅读理解、细节理解题、主旨大意题
【点评】
本文为介绍步行益处的说明文，考查学生快速定位原文信息、理解细节及概括主旨的能力，题目设置贴合初中英语阅读考点，需准确对应原文内容进行判断。
【难度系数】
0.6