1 . Living downstream from a waste-treatment plant can leave fish tired, a new study finds, led by Graham Scott, a biologist in Canada. “Wastewater treatment plants are pretty good at taking out the waste and treating it before it gets into our waterways,” he said. “But not everything can be taken out,” he added.

For example, some plants beside the stream were not designed to remove remains of drugs. So when some medicines are left over after people use them, they can be released into the environment. These include the drugs used to treat depression and high blood pressure.

Life-sustaining chemical reactions in an animal’s body (including ours) allow it to grow, move and reproduce. These reactions, taken together, are known as the creature’s metabolism (新陈代谢). Some studies have shown that even just one drug can change the metabolism of fish, making their metabolism slow down. Then that will impair their bodies.

That creates a problem for the animals — using the extra energy to rid their bodies of the pollutants which can damage their cells and tissues. “That’s energy they burn just to stay alive,” explained Scott. That is also the energy no longer available to avoid predators (天敌), to find food and to mate.

And they report that fish exposed to a mix of chemicals can use up some of their energy just to deal with those pollutants. Therefore, they will have less energy to eat and avoid being eaten, says Paul Craig, a biologist in Ontario.

“It is up to us to help reduce the types of pollutants in. wastewater,” Craig says. “That includes not throwing leftover medicines down the toilet.” he recommends.

1. What do Scott’s words mean in paragraph 1?

A．There are still some pollutants in the treated water.

B．Wastewater treatment plants don’t work well.

C．Things in waterways are difficult to deal with.

D．Canadians tend to throw waste down the toilet.

2. What does the underlined word “impair” mean in paragraph 3?

A．Form.

B．Harm.

C．Benefit.

D．Examine.

3. What will happen if fish are exposed to a mix of chemicals?

A．They will stop growing.

B．They will avoid their mates.

C．They will have to rid their bodies of the polluted cells.

D．They will consume extra energy to survive.

4. What is the author’s purpose in writing the passage?

A．To explain how pollutants affect animals.

B．To show ways of fighting against pollution.

C．To advise people to stop buying polluted fish.

D．To urge people to reduce pollutants in wastewater.

2 . 阅读下面短文，在空白处填入1个恰当的单词或括号内单词的正确形式填空。

With Tokyo Summer Olympics     1     (approach), reports indicate that facial recognition will be used as a security measure at those games. The Japan Times reported the technology would be used to “make the entry to the stadiums simple”.

While spectators (观众) won’t have to receive the     2     (treat), athletes, officials and journalists will be screened, according to the report of The Japan Times.    3     there were complaints of long waits, the organizing committee     4     (prove) the technology during the 2016 Summer Olympics in Brazil quite     5     (success). They hope to sort out the wait and other issues ahead of the Tokyo Games     6     will start in late July 2021.

NEC, the company handling the technology, also tested out their equipment at two airports and is behind a number of other similar projects,    7     (include) software used by the Chicago Police. This technology is becoming far     8     (popular) and the Olympics are just the latest area to use them     9     security purposes. Other examples of planned or in use include robot police in China, bridges and tunnels in New York City, and more widespread uses by the FBI. Also, the technology allows you     10     (use) your fancy new phone and order fast food.

3 . 阅读下面短文，根据其内容写一篇60词左右的内容概要。

Many schools do not pay the right amount of attention to health education as it is often considered as an unimportant subject. And many parents are interested in the basic education of their teenagers — reading, writing and mathematics — but are not interested in the teaching of health. This is not right. Health education provides an introduction to the human body and to factors that improve or damage health. Knowing the knowledge about health can help students become healthy and live happily.

Health education does not only concentrate on being physically healthy. It also focuses on emotional health. Educating students on the importance of health builds their motivation (动力). As a result, they will try their best to keep in good health, prevent illness and avoid risky behavior. Letting students know the importance of good health in schools helps students make healthy life choices when they grow older. It helps them understand the danger of using drugs, smoking and drinking alcohol. It helps prevent various injuries and diseases.

Students these days are highly stressed. Being stressed to get better grades, to look good, to belong to the right groups and to dress right can all make for a stressful life. Once they complete their education, work stress can make the problem become worse. Family life can also add a large amount of stress to students’ lives. Health education also concentrates on stress and helps students learn to handle pressure so that they can create a healthy and positive state of mind.

As teenagers, they may also do not know how to manage their time. This prevents them from putting 100% of themselves into their tasks. For example, school tasks require strict time management, and students who are unable to manage time fall behind. Thus, health education is a necessary part of the education process. It can teach students to manage their time well in order to be more productive.

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