2018-2019学年高中英语 Unit 21 Human Biology 课时跟踪练（三）Le

课时跟踪练(三) Lesson 2 & Lesson 3 — Pre reading

Ⅰ.阅读理解

A

Speed walking has now become part of my daily routine for six years.I am always keen to do it regularly without a break.Even though I am neither a physician nor a specialist in medical science, I am fully aware that exercise, especially speed walking, helps maintain health and lowers the chance of falling ill.

I urge everybody to speed walk on a daily basis, with one day off a week, or at least to do it three times a week.I managed to burn around 17 kg of fat after taking up speed walking.This should also be accompanied with a change in diet.We need to reduce how much

we eat and avoid junk food, sweets and carbonate drinks.Reducing the amount of food we eat in the evening by around 80 percent and increasing how much water we drink are also good practice.Overeating should also be avoided.

I usually walk at a speed of 1 km per 8.5 minutes.It will initially make you tired.However, over time it will become a habit and an addiction.

This type of exercise will help you mentally, will also help you sleep and give you an appetite.It will make you physically fit and help burn fat.Speed walking makes you healthy and everyone can find time to walk.The problem is that some people do not plan their days and do not, therefore, find time.We can gain health and social benefits from speed walking.It will help change our lifestyles, fight diabetes, obesity and other illnesses.

Arguments such as “I am too old and obese to walk” do not hold_water.People of any age who speed walk will see the benefits within a couple of months.Walking outdoors is ideal and it is best done in the company of friends.

语篇解读：本文是说明文。每天坚持快走被越来越多的人作为日常锻炼的一种方法。快走不仅可以减去身上多余的脂肪、走出好的身材，还可以预防疾病、走出健康。 1．What can be the best title for the passage? A．Benefits of speed walking B．My success in reducing weight C．The history of speed walking D．Tips on how to keep healthy

解析：选A 标题归纳题。作者在文中介绍了快走的益处，并且通过自身的实例进行说明，故选A。

2．It can be inferred from the fourth paragraph that ________. A．speed walking possibly leads to an eating disorder B．many people are too busy to have a fast walk every day C．more calories and fat will result in serious illnesses D．speed walking can effectively cure kinds of diseases

解析：选C 推理判断题。依据第四段的第二句可知，快走有助于燃烧脂肪；依据尾句可知，快走会帮助改变我们的生活方式，有助于抵抗糖尿病、肥胖和其他疾病。由此可推知，过多的热量和脂肪会导致疾病发生。

3．What does the underlined part “hold water” mean? A．Have a drink. C．Work out.

B．Make sense. D．Build up.

解析：选B 词义猜测题。依据下文可知，不管多大年龄的人，在快走几个月后就会看到快走的益处。因此此处指那些人说自己太老太胖而不能快走是没有意义的。

B

Most of us are familiar with the “Silk Road”， a network of land trading routes which connected northwestern China to Europe since the Han dynasty.With its recent popularity, you may have heard of the “Tea Horse Road” as well, another network of land trading routes that also connected China to various parts of Asia and Europe before sailing became common.Historically, the “Tea Horse Road” is no less important than the “Silk Road”， and because of their different locations, the “Tea Horse Road” is sometimes referred to as “the Southern Silk Road”．

The “Tea Horse Road” has got its name as Chinese tea and horses were the main products traded along the route (together with medicine, salt, cloth and skins)．Historians have traced the origins of the “Tea Horse Road” back to the Tang dynasty, when tea was being transported out of Yunnan to Beijing, Tibet, and other Southeast Asian countries.The “Tea Horse Road” was further developed during the Song and Ming dynasty, and remained a key trading route for Pu'er tea and other goods until the Qing dynasty.

Like the “Silk Road”， the “Tea Horse Road” was not a “road” by itself, but a network of routes spreading out of Yunnan's Pu'er County.In its more than 1,200 years of history, the “Tea Horse Road” served not only as a trading route, but also a bridge connecting different races (种族) — politically, economically and culturally.

Today, the “Tea Horse Road” is a hot spot for tourists.History aside, the “Tea

Horse Road” is located near “The Third Pole of the Earth” and “The Roof of the Earth”， making it a spot of many attractions.

语篇解读：本文是说明文。茶马古道是指存在于中国西南地区的民间国际商贸通道，是中国西南民族经济文化交流的走廊，也是早期沟通中国西南地区和亚欧商贸的重要通道。 4．What do we know about the “Tea Horse Road”？ A．It dates back to the Tang dynasty.

B．It was built earlier than the “Silk Road”． C．It was built for trading in Southern China.

D．It enjoyed greater popularity than the “Silk Road”．

解析：选A 细节理解题。由第二段“Historians have traced the origins of the ‘Tea Horse Road’ back to the Tang dynasty ...”可知，茶马古道是从唐朝时开始的。

5．Where is the starting point of the “Tea Horse Road”？ A．Tibet. C．Pu'er County.

B．Beijing. D．Europe.

解析：选C 细节理解题。由第三段“...but a network of routes spreading out of Yunnan's Pu'er County.”可知，茶马古道的起点是中国云南的普洱县。

6．The “Tea Horse Road” is now most popular with ________. A．businessmen C．historians

B．explorers D．tourists

解析：选D 细节理解题。由最后一段“Today, the ‘Tea Horse Road’ is a hot spot for tourists.”可知，茶马古道现在是深受旅游者青睐的景点。

C

If you need one more reason to be thankful, here it is.

One recent study from the University of California San Diego's School of Medicine found that people who were more grateful actually had better heart health.“They showed better well-being, a less depressed mood, less tiredness and they slept better，” said the study's author, Paul J．Mills.

Researchers at the universities of Utah and Kentucky observed that stressed-out law students who characterized themselves as optimistic actually had more disease-fighting cells (细胞) in their bodies.

Robert Emmons, a professor at UC Davis, said there's even more evidence.People who keep a gratitude journal have a reduced fat intake — as much as 25 percent lower.Stress hormones (激素) like cortisol are 23 percent lower in grateful people.And having a daily gratitude practice could actually reduce the effects of

aging to the brain.

“Being thankful has such a big effect because of the feelings that go along with it，”Emmons said.“Gratitude works because it recruits other positive emotions (情绪) that have direct physical benefits.”Research shows that when we think about what we appreciate, the calming part of the nervous system works and that can have protective benefits on the body.

“Some people may not be grateful by nature but it is a habit you can get used to，”said Dr.Norman Rosenthal, a doctor and author of Winter Blues.“One very good way is being aware of comparing up.It almost always leads to unhappiness because you can always find a person who is more advantaged than you are.”

Norman says all you have to do is think about being grateful.“Some people say they don't have anything to be grateful for，”Norman said.“If you take such a person to find one little thing to be grateful for and focus on that, you find over time that the feeling of gratitude can change the way they see their lives.”

语篇解读：本文是说明文。研究表明感激不但使我们有好的人际关系，而且对我们的健康大有好处。 7．How does the author mainly explain the reason to be thankful? A．By presenting research findings. B．By making comparisons. C．By analyzing causes. D．By giving examples.

解析：选A 推理判断题。第二、三、四段列举了各个实验、证据解释了我们为什么要感激。

8．Why does the author mention law students in Paragraph 3? A．To advise us to be optimistic.

B．To show that they are under great stress. C．To find a way to increase disease-fighting cells. D．To prove that gratitude is good for people's health.

解析：选D 推理判断题。第三段以对法学学生的实验结果为证，证明了感激对身体健康有益。

9．Which of the following can replace the underlined word “recruits” in Paragraph 5?

A．Beats. C．Prevents.

B．Collects. D．Changes.