根据语篇内容，选择最佳选项。The natural world is colorful with humans, plants and animals showing different colors.There can be many different colors in human skin and it changes with the sunshine， our feelings or our health. This is because of pigments（色素），which reflect light and make what the eye sees as colors. When we feel excited or angry, the heart can send more blood to the face and the pigments in the skin become red.Plants also have pigments. Colors are important for them to live on. The brightc olors of flowers catch the attention of insects， which then carry their pollen（花粉）from one flower to another. Bees can see colors we cannot see, and they follow them to the inside of flowers. Without bees visiting flowers in this way, many plants would die out.Animals also use colors for their own needs. They protect themselves with different colors so as not to be seen by predators. The snowshoe hare, a kind of wild animal, changes colors with seasons for this reason. During summer it has a brown color, and in winter it is white so that it can hide in the snow. However, some animals use colors as a warning to make predators stay away. Bright colors such as yellow and red are often used in this way, Nature, however, is very clever, and predators also use colors to attract the animals they feed on.So,we can see that there are many different reasons and uses for colors in the natural world. Some uses of colors in nature remain unknown, but one thing is for sure. Colors not only make our planet beautiful, but they are also necessary for our planet to live on.

1. 根据语篇内容，选择最佳选项。

The natural world is colorful with humans, plants and animals showing different colors.

There can be many different colors in human skin and it changes with the sunshine， our feelings or our health. This is because of pigments（色素），which reflect light and make what the eye sees as colors. When we feel excited or angry, the heart can send more blood to the face and the pigments in the skin become red.

Plants also have pigments. Colors are important for them to live on. The brightc olors of flowers catch the attention of insects， which then carry their pollen（花粉）from one flower to another. Bees can see colors we cannot see, and they follow them to the inside of flowers. Without bees visiting flowers in this way, many plants would die out.

Animals also use colors for their own needs. They protect themselves with different colors so as not to be seen by predators. The snowshoe hare, a kind of wild animal, changes colors with seasons for this reason. During summer it has a brown color, and in winter it is white so that it can hide in the snow. However, some animals use colors as a warning to make predators stay away. Bright colors such as yellow and red are often used in this way, Nature, however, is very clever, and predators also use colors to attract the animals they feed on.

So,we can see that there are many different reasons and uses for colors in the natural world. Some uses of colors in nature remain unknown, but one thing is for sure. Colors not only make our planet beautiful, but they are also necessary for our planet to live on.

(1) Why does our skin become red when we feel angry? A. We are in very good health. B. Our hearts send more blood to our skin. C. The pigments reflect more bright light.

(2) What can we learn from Paragraph 3? A. Why do flowers look beautiful. B. Colors are important for plants to live on. C. Why do insects like bright colors of flowers.

(3) What does the underlined word "predators" most probably mean in Chinese? A. 凶猛的动物 B. 温驯的动物 C. 捕食性动物

(4) What does the example of the snowshoe hare in Paragraph 4 mainly tell us? A. It uses color to protect itself. B. It has different colors. C. It is very clever.

(5) What＇s the structure（结构）of the text？（P—Paragraph） A.

【考点】

科普类; 说明文;

【答案】

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阅读选择普通

1. 阅读理解

Scientists have found out that wearing different colours can have different power. If we are sad,we choose to wear some dark colours. If we are happy,we often wear some bright colours. So how can colours change our feelings? What colour should we wear? Here is some advice.

If you are feeling sad,don't wear black. It will make you feel worse. But if you choose green or red,it will make you feel better. Red can make you have more energy. Blue can make you think better and get good ideas. Orange can make you happier. You can be cleverer than before if you are in yellow. So yellow is good for your studying. It is easier for you to find your love when you are in pink. When you see someone wearing black,you can feel safer.

So try to make you happy by changing the colour of your clothes.

(1) How many colours are mentioned in the passage? A. Six. B. Seven. C. Nine.

(2) If you are sad,which colour should you wear? A. Red. B. White. C. Black.

(3) If you want to come up with a new idea,____ can help you. A. orange B. pink C. blue

(4) Yellow is good for your ____ according to the passage. A. love B. energy C. studying

(5) Which of the following is NOT true? A. Colours can't change our feelings. B. The passage gives much advice about what colours to wear. C. Black can make us sad,but it can make us feel safe,too.

阅读选择普通

2. 阅读理解

Inventions usually make a big difference to people's lives. Do you have any great inventions at home? Do they help you a lot in your life or bring you much fun? Here are some of the most useful inventions in families according to a survey.

The most helpful and creative invention for kids is the reading pen.

With the specially-designed pen, kids find it convenient and fun to learn.

Little kids can learn a lot, including story-telling, poems and music.

They start learning by touching the contents (内容) in the books with the pen. This way kids can learn by themselves. They are also great helpers for primary school students after school.

Sweeping robots are popular with people who are too busy to do housework. They are more popular with office ladies. They can help people clean dirt, dust and hair easily. With the help of them, people don't need to spend much time on housework. They can enjoy a more relaxing life after work.

As for old people, an electric foot basin (盆) is the best invention. It's a good choice to buy one for your grandparents. It can help keep their blood pressure normal.

The special basin can keep the water warm. So washing feet with it will help old people become healthier and more relaxed.

(1) How do the kids learn with the reading pen? A. By reading books. B. By using the Internet. C. By painting some pictures. D. By touching the books.

(2) Who needs sweeping robots most according to the passage? A. Jim, 6 years old. B. Bill, a primary student. C. Miss Zhang, an office lady. D. Mr. Green, 70 years old.

(3) Where can you easily find these three inventions? A. At home. B. In a library. C. At school. D. In an office.

阅读选择普通

3. 阅读理解

Yawning(打哈欠) is something we all do—maybe because we're tired or we are not interested in the same old things. Sometimes, just seeing other people yawn can make us yawn, too. But why does it happen like this?

Many of us think we open our mouths when we yawn to take in more air, but in fact it appears there is no clear biological reason. According to BBC Bitesize, a new research suggests it might be because yawning cools the brain(大脑) down and stops it from yawn getting too hot, much like the fan in the computer. This might be why we're more likely to feel sleepy and yawn in warm temperatures.

What is clear is that we might yawn more when we're very tired and ready for a short sleep, and we can control ourselves when we do it. Yawning is something that we can't stop. It happens whether we want to or not. Once we start, nothing could stop us! It's also true that yawning is a contagious behavior. John Drury, a researcher from Sussex University, told BBC, "Dogs yawn when their owners yawn, and animals yawn to each other" His research of this behavior found that it is related to our social group and how close we are to these people, and that we are likely to copy their behavior.

Another research by the University of Nottingham in 2017 found similar results. They asked volunteers to watch other people yawn. They found people's ability to stop yawning was limited(限制) when others around them yawned. They also found when people were told not to yawn, or using electrical stimulation(电), their desire(欲望) to yawn would increase. These findings could be useful, the researchers said, because it might help treat other conditions like Tourette's(儿童抽动症), which involves the same area of the brain.

What is certain is that the act of yawning can happen at any time even when we think we're not tired.

(1) According to BBC Bitesize, the reason why we yawn might be____. A. our brains need to exercise B. our brains need to be cooled down C. our brains are in need of more air D. our brains work better in warm temperatures

(2) The underlined word contagious in Paragraph 3 probably means____. A. trained B. expected C. connected D. controlled

(3) What can we learn from the research by the University of Nottingham? A. The findings of the research have been used to treat some disease. B. People will no longer want to yawn when they arc told not to do it. C. People will probably yawn when they see someone around them yawn. D. The use of electrical stimulation can help control the strong wish to yawn

(4) What is the passage mainly about? A. The ways of yawning. B. The studies of yawning. C. The reasons of yawning D. The advantages of yawning.

阅读选择困难