From red apples to yellow bananas, fruit comes in many different colors. Why do different kinds of fruit have so many colors?
To find out how environment influences fruit colors, Chinese scientists studied more than 280 different fruit colors, including white, red, blue, purple and black.
They found that red fruit usually grow in cooler places. Blue and purple fruit mostly grows in warm places. These fruits often grow a lot in just one area. The scientists also found that the closer the fruit is to the equator（赤道）, the darker its color will be.
Animals have also had an influence on fruit colors. Animals eat fruit and drop the seeds（种子）in other places later. This helps the fruit spread and grow in different places. So, in order to interest animals, some fruit develops colors that are easy for animals to see. For example, birds can see red more easily than humans can. So there are more red fruit in areas where birds live.
1. Chinese scientists studied different fruit colors to find out how the ________ influenced fruit colors.| A．sunshine | B．environment | C．animals | D．weather |
| A．It’s cool. | B．It’s warm. | C．It’s hot. | D．It’s cold. |
| A．Fruit in different places. | B．Fruit and seeds in other places. |
| C．Ways to interest animals. | D．The influence of animals on fruit colors. |
相似题推荐
【推荐1】
①Do you know your small intestine(小肠）is nearly six meters long? Do you know there are many muscles(肌肉）in your face? How about the fact that our hearts beat over 100,000 times each day? Your body is really amazing!
②The human body is a complex(复杂）machine. The body has many different parts that work together to allow us to breathe, move, see, talk and eat. Most of the time we don’t know what’s happening in our bodies, usually it’s only when we get sick or feel the pain that we notice it.
③Many people don’t care for their complex machines. Bad habits like smoking, drinking and eating junk food can be bad for our bodies. Stress can also cause health problems. People who worry a lot or have busy jobs often don’t get enough sleep, or don’t eat properly. We can also hurt our bodies when we play sports or get into accidents. It’s true that many people go to hospital because of serious illnesses, but far more people end up there simply because they aren’t careful.
④Like machines, different body parts sometimes wear down from old age. They are less able to repair themselves. People over the age of 65 are more likely to fall and hurt themselves. As the population of elderly people increases, gerontology(老年病学）has become one of the fastest growing areas of medicine. There are many treatments available to help older people now. Older people can lead happier and more comfortable lives.
1. The writer organizes Paragraph 1 by _______.| A．explaining some problems |
| B．comparing some facts |
| C．giving some facts about himself |
| D．asking readers some questions |
| A．Paragraph 1 | B．Paragraph 2 | C．Paragraph 3 | D．Paragraph 4 |
| A．We can know the conditions of our body early. |
| B．Gerontology receives increasing attention nowadays. |
| C．Serious illnesses are the main reason why people go to hospital. |
| D．Our small intestine is only two meters long. |
| A．Our body machines. | B．How to look after our bodies. |
| C．How to care for older people. | D．Our health problems. |
【推荐2】TRY THIS
1. In which steps do we need the glass?
| A．Step 1 and Step 4. | B．Step 3, Step 4 and Step 5. |
| C．Step 4 and Step 5. | D．Step 1, Step 3, Step 4 and Step 5. |
| A．the wet string | B．the tiny water molecules |
| C．the tension of the water surface | D．the tilted (倾斜的) pitcher |
| A．English novel | B．tour guide | C．teenage newspaper | D．geography book |
People already know a lot about animals. However, there are still some things about animals that may surprise you. Here are some facts about animals you probably didn’t know.
 | Cows do have best friends and feel stressed when they are separated. Scientists have found that cows are very social animals and a cow always makes friends with other cows. When a cow is with its friends, it feels relaxed, compared with when it is alone. |
 | Crocodiles swallow stones. Crocodiles always swallow their food instead of eating it like other animals. They swallow stones which break the food into very small pieces in their stomachs. These stones may stay in their stomachs all their lives. |
 | During breeding(繁殖) season, a male(雄性的) penguin(企鹅) will offer a small stone to a female(雌性的) penguin as a gift. If she takes it, they will become partners. When the female penguin lays an egg, she and her partner may carry it on their feet, because some penguins don’t build nests. |
 | Elephants use plants to treat pain or other illness. Scientists once found that a pregnant elephant in Africa ate a plant after being injured, which was not part of its normal food. Four days later, she got well. Soon she gave birth to a baby elephant. The same plant was used by the local pregnant women. |
| A．Cows need friends. |
| B．Cows don’t have pressure. |
| C．Cows want to relax themselves. |
| A．Because the stone is delicious. |
| B．Because they like stones. |
| C．Because their bodies need stones. |
| A．Crocodiles like stones. |
| B．Female penguins have partners. |
| C．Elephants are very talented. |
| A．Animals are very interesting. |
| B．Some animals are born with abilities. |
| C．Nature has changed some animals. |
| A．The different living ways. |
| B．The special living habits. |
| C．The interesting living rules. |
【推荐1】A satellite is a moon (卫星) planet or machine that goes around a planet or star. For example, Earth is a satellite because it goes around the sun. Likewise, the moon is a satellite because it goes around the earth. Earth and the moon are examples of natural satellites. Thousands of artificial (人造的) satellites goes around the earth.
Some of satellites are used to take pictures of Earth to help meteorologists(气象学家) predict(预测) weather and track hurricanes(飓风). These pictures help scientists better understand the solar system and the universe. And the information of the pictures helps people on the earth work and live better.
There are also some satellites used for communications. Before satellites, TV signals (信号) didn’t go very far because sometimes mountains or tall buildings would block them. At that time. TV signals only travel in straight lines. Phone calls to faraway places were also a problem. Setting up telephone wires(电线) over long distances or underwater is difficult and costs a lot. With satellites, TV signals and phone calls are sent upward to a satellite. Then the satellite can send the signals to different locations on Earth.
With so many functions (功能), what’s the future of satellites? Do you know the answer?
1. What’s the main idea of Paragraph 1?| A．What a satellite is. | B．Something about Earth. |
| C．Natural satellite. | D．The moon is a satellite. |
| A．help scientists predict weather and track hurricanes |
| B．be used for communications |
| C．steal information |
| D．navigate(导航) and locate for ground, ocean, air and space users |
A． | B． |
C． | D． |
| A．Confident. | B．Disappointed. | C．Hopeless. | D．Doubtful(怀疑的). |
| A．People will not spend anything on them. | B．Satellites will be developed better. |
| C．Satellites will still remain the same. | D．Maybe satellites will be replaced. |
【推荐2】When spring is in the air, everyone looks forward to seeing the beautiful and eye-pleasing flowers and plants. The following flowers and plants might not be so eye-pleasing, but are certainly eye-catching!
Lady's Slipper
This flower is amazing. It looks like a shoe. To be more exact, it is like a lady's slipper. That's how it gets its name. Although it was once found across Europe and the UK, now Lancashire in England is the only place where this plant can be found. The flower was so unusual that people picked almost all of them. Besides, it is one of the most difficult plants to grow. Fortunately, strict rules have been made to protect this endangered plant.
Hot Lips
When you see a plant like this, don't get shocked! No, they are not a woman's lips （唇）! You can find these plants in countries with tropical （热带的） rain forests, such as Colombia, Costa Rica and Panama. Because of the cutting down of trees, these unusual plants have become endangered.
Black Bat Flower
The black bat flower is an unusual flower that grows in the wild and tropical forests of Yunnan Province in China. It is famous for its bat﹣shaped black flowers. It needs special environmental conditions to grow. This is the reason why it is an endangered plant.
You can consider yourself lucky if you actually see one of the plants mentioned above. After all, they are all endangered and disappearing from the earth. Hopefully, there are other unusual flowers that are left and undiscovered, because the world is full of surprising things!
1. What does the underlined part in Paragraph 1 mean？________
| A．When spring comes. |
| B．When spring flies. |
| C．When spring is gone. |
| D．When the air is fresh. |
| A．One. |
| B．Two. |
| C．Three. |
| D．Four. |
a.
b.
c.
d.
| A．Lady's slipper（a）, Hot lips（b）, Black bat flower（c） |
| B．Lady's slipper（c）, Hot lips（a）, Black bat flower（b） |
| C．Lady's slipper（d）, Hot lips（c）, Black bat flower（b） |
| D．Lady's slipper（d）, Hot lips（c）, Black bat flower（a） |
| A．Get to know these eye﹣pleasing flowers |
| B．Three kinds of unusual tropical flowers |
| C．The world is full of surprising things |
| D．How to protect the endangered plants |
【推荐3】①You have waited 45 minutes for the valuable 10 minutes’ break. But when the bell for the next class rings, you can’t believe how quickly time has passed. If you have this experience, you’ll know how time flies when you are having fun and drags when you are bored. Now scientists have come up with a reason why this happens.
②They have found that the brain changes its way to work according to how we direct our attention to a task. When we are bored, we pay more attention to how time is passing. And this makes our brains think the clock is ticking more slowly.
③Recently some researchers who want to understand the conditions carried out an experiment. In the experiment, twelve volunteers watched a picture while researchers paid attention to their brain activity.
④The volunteers were told to first notice how long a picture appeared, then the color of the picture, and thirdly, study the both. The results showed that the brain was more active when the volunteers paid attention to more subjects.
⑤It is thought that if the brain is busy noticing many aspect（方面）of a task, it has to spread its resources, and pays less attention to the clock. Therefore, time seems to go quickly. If the brain is not so active, it spends its full energy on the passing of time. As a result, time seems to move slowly.
⑥Next time you feel bored in class, perhaps you should concentrate（聚精会神）on what the teacher is saying.
1. What does the underlined word “drags” probably mean?| A．passes slowly | B．passes quickly | C．passes actively | D．passes meaningfully |
| A．We will be full of energy if we do nothing. |
| B．Time goes by slowly when we are interested in things. |
| C．Concentrating on more subjects is a way to make people more active. |
| D．Time goes by slowly when the brain is noticing many things at the same time. |
| A．The best way to save time. | B．The importance of planning time. |
| C．The reason for time flying and dragging. | D．The importance of saving time. |
| A．①②/③④⑤/⑥ | B．①/②③④⑤/⑥ | C．①②/③④⑤⑥ | D．①/②③④/⑤⑥ |
