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Olympic medals are gold, silver and bronze. But the 2020 Tokyo Games want their medals to be “green”, according to CNN. Japan is going to make the Olympic 2020 medals by reused materials.

Japan has one of the highest recycling rates in Asia, according to OECD data. However, this is mainly used for plastic, paper and glass. The Tokyo Games will collect unwanted mobiles and other electronic devices (电子产品) from the Japanese public. They will recycle metal from those devices to help make 5,000 medals. Organizers hope to get eight tons of metal.

The public also gets a chance to be part of the Olympic journey, said the organizers. Recycled, or “green”, materials have been used to make Olympic medals in the past. Last year's Rio Games made 30 percent of their silver and bronze medals from recycled materials.

How does e-waste recycling work? Recycling or processing companies either collect or buy tons of this e-waste and used industrial products. They then use chemical processes to separate the different metals. Much of this work takes place in developing countries such as China, India and Indonesia.

1.What will the Olympic medals in the 2020 Tokyo Games be made from?

Japan will collect ________________ to make the Olympic medals.

2.How many medals will they make?

They will recycle metal to help make ________________ medals.

3.Why do the Tokyo Olympic Games collect materials from the Japanese public?

Because it’s a good chance for the public to be ________________ the Olympic journey.

4.What does “They” in last paragraph mean?

It refers to ________________.

5.What does the last paragraph mainly tell us?

It mainly tells about ________________.

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Rachel Carson(1907-1964) was a pioneer of the world’s environmental movement through her writing about the protection of the natural world. Her 1962 book Silent Spring made her well known by many people. It describes the harmful changes in the environment of using toxic(有害的) chemicals on farmland.

Carson’s career started as a biologist in the US Bureau of Fisheries. In 1951 she published her first book, The Sea Around Us, which became a bestseller. It made her rich enough to leave her job and devote her life to writing. She was a gifted writer. Her next two books were also about the oceans and both topped the book sales lists.

Carson’s book Silent Spring completely change the way America though about nature. It painted a bleak(荒凉的) future for the whole natural world. It led to a nationwide ban(禁止) on the use of a deadly chemical called DDT, and other toxic pesticides(农药) that farmers used for their crops. Many people say the book led to the creation of America’s Environmental Protection Agency.

Since her death, Carson’s name has continued to be connected with protecting the environment. There is now a yearly Rachel Carson Book Prize. Norway awards the Rachel Carson Prize to women who have made great contributions to the field of environmental protection. In 1980, 16 years after her death, she was awarded the Presidential Medal of Freedom, the highest civilian honour in America.

1.Rachel Carson gave up working as a biologist in 1962.

2.Rachel Carson left her job because the US government took notice of her researches.

3.The book Silent Spring changed how American thought about nature.

4.The underlined word “It” in Paragraph 3 means the book Silent Spring.

5.Rachel Carson was awarded the Presidential Medal of Freedom for giving away much money to the

Rachel Carson Book Prize.

Is your TV connected to the Internet? What about your chair or your fridge? It is possible that they are not. But in the future, most things in your home may be connected, as the so-called “Internet of things” is developing.

The Internet of things may be coming sooner than you think. It is reported that during his speech earlier this year, Samsung CEO(首席执行官) BK Yoon spent a lot of time talking about the Internet of things. He said that five years from now, every Samsung product will be part of the Internet of things, whether it's a washing machine or a vacuum cleaner(吸尘器).

So, how do household(家用) objects that are part of Internet of things work? Well, think of a usual chair. When connected to the Internet, the chair warms up when it knows that the user has just walked into the room and is feeling cold. 

An Internet-connected camera, like a smart-home camera, could help people feel safer in their homes. It can recognize(识别) people’s faces, and even can see when someone passes by in the dark. Then it can send you a message on your smartphone to let you know who's there. If the person is someone you don't know, it can tell you that, too.

But according to MIT Technology Review, whether companies are connecting dog food bowls or security(安全) systems to the Internet, there may be problems. For example, many early connected-home devices(装置) don't have much built-in security, which means they could be hacked(被黑客攻击). In addition, it could be difficult to get these devices to work together because they are made by different companies. To fight this, many companies have joined the Open Interconnect Consortium, which had 45 members by late 2014.

So, picture this: you walk in through the front door of your home. The temperature changes to make you feel comfortable after a long day at school. Your favorite music starts playing for you. Do you think that this would be a good thing? It may happen sooner than you think.

1.The Samsung CEO's speech is mentioned to prove that _____.

A. the Internet of things will appear in our daily life sooner

B. Samsung has produced the Internet of things recently

C. Samsung products have been part of the Internet of things

D. he spent a lot of time talking about the Internet of things

2.We can infer(推断)from paragraphs 3 and 4 that ______.

A. the chair can know whether the user feels cold or not

B. a usual chair can warm up when it knows the user comes in

C. an Internet-connected camera can be used to take photos in the house

D. an Internet-connected camera can be connected to the user's smartphone

3.According to the passage, it is mentioned that _____.

① the temperature inside is neither too high nor too low

②your fridge provides the drinks for you

③ the chair warms up if you feel cold

④your favourite music starts playing

⑤your washing machine starts working

A. ①②⑤ B. ②③④ C. ①③④ D. ①④⑤

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