Do you know why different animals or pests(昆虫)have their special colours?Colours in them seem to be used mainly to protect themselves.
Some birds like eating locusts(蝗虫),but birds cannot easily catch them.
Why?It is because locusts change their colours together with the change of the colours of crops. When crops are green,locusts look green. But as autumn comes,locusts change to the same brown colour as crops have. Some other pests with different colours from plants are easily found and eaten by others. So they have to hide themselves in the day and appear only at night.
If you study the animal life,you'll find the main use of colours is protecting themselves. Bears,lions and other animals move quietly through forests. They cannot be easily seen by hunters. This is because they have the colours much like the trees.
Did you ever notice even strange act?A kind of fish in the sea can send out a kind of very black liquid(液体)when it faces danger. While the liquid comes out,other sea animals cannot find it. So it can easily swim away. It's not strong at all. But in this way it has lived up to now.
1. From the passage we learn that locusts.A.can change their colours only in autumn | B.are easily found by birds |
C.are dangerous to the birds | D.can change their colours to protect themselves |
A.They have the colours much like their enemies. | B.They run away quickly. |
C.They hide themselves in the day and appear only at night. | D.They have to move quietly. |
A.have the colours much like the things around them | B.move quietly |
C.like brown and grey colours | D.live in forests |
A.it is very big and strong | B.the liquid it sends out can kill other fish |
C.the liquid it sends out helps it run away | D.it swims faster than any other fish |
A.The Change of Colours for Animals and Pests | B.Colours of Different Animals and pests |
C.The Main Use of Colours for Animals and Pests | D.Some Animals and Pests |
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【推荐1】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.
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.
Crocodiles (鳄鱼) swallow (吞) 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.
Elephants use plants to treat pain or other illness. Scientists once found a pregnant (怀孕的) elephant in Africa who ate a kind of plant which was not part of her normal food. Four days later, she gave birth to a baby elephant. The same plant was used by the local pregnant women.
1. A cow hates making friends with other cows.2. All the male penguins will build nests if the female penguins lay eggs.
3. Crocodiles swallow stones to help with digestion (消化).
4. Elephants eat plants only when they are hungry.
1. Tigers and lions like eating ________.
A.vegetables | B.meat | C.fruit | D.rice |
A.one | B.two | C.three | D.four |
A.black | B.brown | C.white | D.Both A and B. |
A.front;back | B.back;back | C.front;front | D.back;front |
A.Children like to ride on one of the elephants in the zoo. |
B.The elephants are very friendly to people. |
C.Lingling, the panda, likes eating cakes. |
D.Elephants like bananas very much. |
![](https://img.xkw.com/dksih/QBM/2022/4/1/2948716360515584/2948960084574208/STEM/b71659f41ce449619ee2c3d207b3b7d2.png?resizew=332)
When you close your eyes and need to rest, sleep is just the very best. Sleep helps your body grow and stay healthy. However, in the animal world, it seems that some animals don’t need much sleep.
Giraffes usually sleep, although not for a long time. In places like zoos giraffes have been known to sleep for between four and five hours, mostly at night. During sleep, the animal may lie down or stay standing. Standing sleep is more common among older giraffes. In the wild, however, the animals almost never sleep for longer than five minutes at a time. More often, they sleep fully standing and their eyes are half-open so they can see an enemy getting close.
Deer(鹿) do not sleep much during the day or the night. In fact, the night is a dangerous time for the animal to sleep because some of their enemies look for food at night. However, deer try their best to sleep for three to four hours. Even when sleeping, they have to be careful so that they do not become food for their enemies.
The Alpine Swift(雨燕) is a bird that lives in places from southern Europe all the way to the Himalayas. These birds spend a lot of their time flying to the warmer places and all the way to the south of Africa. The birds may spend up to 200 days flying during their journey. These birds sleep while they fly. The Alpine Swifts are able to sleep with one side of their brain while the other side pays much attention to flying and finding enemies.
Dolphins(海豚) usually go to sleep with only one side of their brain. So that they use the other side of their brain for swimming and to watch out for enemies. Some dolphins do not go to sleep in the first month of their lives. Instead, they rest by pushing their bodies against their mothers so that they do not drown(淹死). Mothers need to make sure that they do not go to sleep. That is why mother dolphins are able to go for a least a month without sleeping.
1. Which of the following facts are true about giraffes?A.In the wild, they may lie down to sleep. | B.In the zoo, they sleep with their eyes half-open to see an enemy. |
C.In the zoo, the younger ones are likely to sleep standing. | D.In the wild, they sleep no more than five minutes at a time. |
A.smell danger | B.look for food | C.feed their young | D.move to another place |
A.It sleeps during the day. | B.It can stay awake for 200 days. |
C.It can sleep while it flies. | D.It needs no sleep in warm places. |
A.Babies don't sleep at all. | B.Mothers sleep less than fathers. |
C.Babies rest with their mothers. | D.They sleep with half of their brain. |
【推荐1】If you bought some bread months ago but never ate it, how can you tell whether it is still safe to eat? The common way is to check the “use-by date”. If that date has already passed, you’re likely to throw the bread away. But is that really necessary?
According to a new report from the US Natural Resources Defense Council (NRDC), tons of food is wasted each year, largely because people don’t fully understand what “use-by dates” actually mean.
Food dating was introduced in the 1970s because consumers wanted more information about the things that they were eating. When they first showed up, use-by dates were only supposed to show freshness because producers wanted their products to be tasted in their best conditions.
But the truth is that these dates aren’t related to the risk of food illness, according to Times News. However, most customers misunderstood use-by dates and related them to the safety of the food, and they still largely do now. Eggs, for example, can still be eaten three to five weeks after selling even though the use-by date is much earlier. When their use-by dates pass, strawberry drinks may lose their red color and biscuits may lose their crunch (松脆), but they are not harmful.
This is why scientists are calling for a standard explanation to be printed following the use-by dates. “We want this to be clearly communicated so customers are not misunderstanding and causing a lot of waste,” said Dana Ganders, a staff scientist with the NRDC. But this will be a problem that is difficult to solve because people have believed it for so long. Another problem is that the quality levels of different foods change differently—some are still safe to eat long after their use-by date while others are not.
As a result, food industry officials are now thinking of changing the use-by date to a date indicating (指示) when food is most likely to go bad.
1. Why was the first use-by date introduced?A.To give a warning of food illness. | B.To show the safety of food. | C.To tell the freshness of food. | D.To make consumers taste food. |
A.Most customers understand what use-by dates mean. | B.“Use-by dates” have existed for more than 60 years. |
C.Biscuits can’t be eaten when not as crunchy as they are bought. | D.Even after their use-by dates pass, some foods are still safe to eat. |
A.It’s helpful to print an explanation of use-by dates for customers. |
B.Communicating with customers about the use-by dates is not necessary. |
C.It’s useless to print a explanation of use-by dates for customers. |
D.Printing an explanation of use-by date will not help reduce food waste. |
A.![]() | B.![]() | C.![]() | D.![]() |
【推荐2】If you used“add oil”to express encouragement or support someone in your spoken English or your homework in the past. Your English teacher would tell you that you were wrong. But now, things are different, the phrase has been added to the Oxford English Dictionary. "Add oil" has been “legal(合法的)” Chinglish as well as "lose face”and “long time no see".
The phrase,“加油(jia you) in Chinese means adding oil into the engine(发动机). Chinese often speak it loudly in games and competitions to encourage players.
Even though the phrase is widely used in the Chinese language, it's always been difficult to come up with a proper way to translate it into English. The phrase is used oil, so after that some people jokingly(开玩笑地)translate it into “add oil”.
Before taking in “add oil”, some other Chinese phrases have been included in the Oxford English Dictionary such as guanxi (personal connections that aid business) and lucky money(money given in red bags). In recent years, the Oxford English Dictionary has taken in other Chinese popular words like tuhao (meaning rich person who comes from countryside) and dama(referring to elderly women).
In 2014, the American Urban Dictionary took in a few Chinese Internet popular words such as no zuo no die(which translates into English as “if you don't do stupid things,they won't come back and bite you in the back”),"you can you up, no can no BB”(which translates into English as "if you can do it you should go on and do it, instead of criticizing(批评)others ' work").
According to the Oxford English Dictionary website, more than 1,400 new words and phrases have been added into it. With the development of China, there will be more Chinese popular words in English.
1. From the first paragraph, we can know________.A.we can't use "add oil” in written English but spoken English |
B.teachers don't allow the students to use “add oil” in written English |
C.we can find “add oil"in the Oxford English Dictionary now |
D.“lose face”and"long time no see”are not legal Chinglish |
A.Because it can be widely used in important competitions. |
B.Because people who speak English like using it very much |
C.Because some people want to use it to play jokes. |
D.Because it's used widely and it's difficult to translated it into English. |
A.“guanxi”was add to the Oxford English Dictionary earlier than “add oil” |
B.“tuhao”and“dama”will be added to the Oxford English Dictionary soon |
C.if a person who has lots of money, we can call him/her“tuhao" |
D.“lucky money” in the money in red bags that given by“tuhao" |
A.Some Chinese popular Internet words have been added to the American Urban Dictionary. |
B."No zuo no die”means “if you do something stupid,you will be punished badly". |
C."You can you up no can no BB”is used against people who criticize others' work. |
D.Over 1,400 new words and phrases have been added into the Oxford English Dictionary |
A.Chinese is getting more and more popular around the world. |
B.English will take in more and more Chinese popular words. |
C.More and more English popular words will appear in Chinese. |
D.English is getting more popular than before in China. |
【推荐3】When you look at the night sky, what you see are actually lots of “power plants” (发电厂). Every star makes a huge amount of energy through nuclear fusion (核聚变). For years, scientists have tried to make this kind of energy. They to make a “mini star” on Earth. Recently, some scientists made a big step forward.
In February 2002, the Culham Centre for Fusion Energy in Oxfordshire, UK, doubled a world record set in 1997. The machine there, named Jet, used fusion engines (发动机) to make the same amount of energy as four wind turbines (涡轮机) make, reported The Cuardian.
In the past, no experiment could mate more energy than what was used to start the fusion engine. This new experiment, although it only lasted five seconds, showed it’s possible to make more power.
Another good thing about the experiment is that the reaction stopped when the equipment (设备) got too hot. This problem can be solved with cooling systems. Future fusion reactions may last much longer than five seconds, minutes or even hours.
You may wonder why fusion energy is so hard to make. Creating conditions similar to a star is not easy. The machine must reach temperatures as high as 10 times that of the sun’s core (核).
Even so, it’s time to get excited about star power. If it can be successfully rolled out (开展), it will be a landmark (里程碑) in human history.
1. What does the word “plants” in the first paragraph refer to?A.scientists | B.nuclear plants | C.stars in the sky | D.mini stars on Earth |
A.a wind turbine | B.two wind turbines | C.three wind turbines | D.four wind turbines |
A.Choosing hotter equipment. | B.Starting a new experiment. |
C.Creating a warmer environment. | D.Using a cooling system. |
A.It exists in a very cold environment. | B.Scientists are trying to take it from the core of the sun. |
C.It is very difficult to make on Earth. | D.It is now useful in everyday life. |
【推荐1】“ Don’t tell anyone”. We hear these words when someone tells a secret to us. But it can be hard to keep a secret. We’re often tempted to “ spill the beans”, even if we regret it later.
According to Asim Shah, a professor at Baylor College of Medicine, US, keeping a secret may well “become a burden”. This is because people often have an "obsessive (过度的)and anxious urge to share it with someone".
An earlier study, led by Anita E. Kelly, a scientist at the University of Notre Dame, US, suggested that keeping a secret could cause stress. People entrusted with secrets can suffer from depression (沮丧), anxiety, and body aches, reported the Daily Mail.
But with secrets so often getting out, why do people share them at all? Shah explained that people often feel that it will help them keep a person as a friend. Another reason people share secrets is guilt over keeping it from someone close to them. A sense of distrust can develop when people who are close do not share it with each other. "Keeping or sharing secrets often puts people in a position of either gaining or losing the trust of someone," according to Shah.
He added that talkative people could let secrets slip out. But this doesn't mean that it is a good idea only to share secrets with quiet people. A quiet person may be someone who keeps everything inside. To tell such a person a secret may cause them stress, and make them talk about the secret.
Shah said that to judge whether to tell someone a secret, you'd better put yourself in their position. Think about how you would feel to be told that you mustn't give the information away. Shah also recommended that if you accidentally give up someone's secret, you should come clean about it. Let the person know that their secret isn't so secret anymore.
1. What is the meaning of the underlined phrase “spill the beans”?A.Keep a secret. | B.Give a secret away. | C.Make beans out. | D.Give up the friendship. |
A.secret | B.trouble | C.knowledge | D.drive |
A.Talkative people could let secrets slip out easily. |
B.It's a good idea to share your secrets with quiet people. |
C.Quiet people can always keep everything inside. |
D.It's possible that quiet people also talk about secrets. |
A.Tell secrets to a person close to you in order not to feel guilty. |
B.Put yourself in someone’s position and decide whether to tell a secret. |
C.Don't let the person whose secret is given up by you know the truth. |
D.Share someone's secret with as many people as possible. |
A.it can be hard to keep secrets because we will regret it later. |
B.people should never share secrets with others. |
C.if you let out your friends’ secrets, you should be honest with your friends about it. |
D.your friends may feel angry if you slip out their secrets. |
【推荐2】The day was like any other day in his life, Bill walked past the shop on the street corner. He stopped to look at the front row(排,列) of shoes, and he felt happy to see that the pair of shoes he wanted very much were still there. Looking down, he felt sorry for himself. He really wanted to have them for his birthday.
He sadly walked away and thought how to tell his mother about it. He knew she would give him anything he liked if she could. But he also knew very well she had little money. He decided(决定) not to go home at once, as he looked worried and his mother would notice (注意) it. So he went to the park and sat on the grass. Then he saw a boy in a wheel chair (轮 椅) . He found (发现)that the boy moved the wheel with his hands. Bill looked at him carefully and was surprised to see the boy have no feet. He looked at his own feet. “It's much better to be without shoes than without feet, ” he thought. There was no reason (理由) for him to feel sad. He smiled, thinking he was happier.
1. Bill was so sorry because .A.the shoes in the shop were not the right size for him. | B.he forgot to bring any money with him. |
C.his mother couldn't buy him a pair of shoes | D.he walked past the shoe shop. |
A.because his mother was at work. |
B.because his mother wouldn't give him any money. |
C.because he wanted to sit on the grass in the park. |
D.because he didn't want to give his mother any trouble(麻烦) |
A.Bill's mother has much money. | B.Bill's mother was a kind-hearted(热心的)woman. |
C.Bill's mother wouldn't buy him anything. | D.Bill's mother often bought presents for Bill's birthday. |
A.without feet | B.without hands |
C.walking slowly | D.looking down at his shoes |
A.decided to buy a new pair of shoes. | B.left the park sadly. |
C.thought he's luckier than the boy in the wheelchair. | D.didn't know what to do |
Water can change from a solid to a liquid or to a gas easily. This is why we always have fresh water. Now let us find out how it does. The heat of the sun turns liquid water into gas from the oceans, seas, rivers and lakes. The heat also turns liquid water into gas from the ground, the plants and the animals. Water in the gas rises and turns into clouds in the air.
When the clouds come near a mountain, they rise high. As the clouds rise, they get cooler. The higher they rise, the cooler they become. Then more and more water gas turn into water drops. In this way, the drops of water in the clouds get bigger and bigger. Then they fall to the earth as rain.
根据短文内容,选择正确答案
1. What is the solid of water?
A.Rain | B.Gas | C.Stone | D.Ice |
A.liquid | B.soild | C.gas | D.snow |
A.the wind | B.the heat of the sun |
C.the mountain | D.the earth |
A.seas | B.oceans | C.mountains | D.farms |
A.the cooler | B.the hotter | C.the heavier | D.the bigger |
【推荐1】Everybody says that youth(青春) is the best time of our lives. Being young means romance(浪漫), love and new discoveries, but it is also the most difficult time, because you have to make some very important decisions, which will influence your future life.
Things are not easy nowadays even for adults, but for teenagers, who have to find their own place in society, it’s even difficult. It is necessary not only to adapt to(适应)society, but also to be confident of your position in five, ten or even twenty years time.
For the future it is important to have a good job. In order to get a really good job, you have to be well educated.
Emotional problems for young people can be very important, too. The first teenager problem is that “nobody understands me”. Some parents often continue to treat their children as little children when they are starting to consider themselves to be adults.
There are also some global problems. Young people in all countries are facing these problems. Let’s start with smoking. According to studies, at the age of 16, almost 72% of all boys and 37% of all girls in Russia have already tried smoking. Smoking is not a natural need. It’s just that teens try it when they want to appear to be more like adults.
Drugs are also a serious problem. Students know the names of drugs well enough. 32% say they have tried drugs at least once, mainly because they were having fun, their friends influenced them to, they wanted to relax or they wanted to seem “cool”. That’s too bad.
So, you see, problems do happen and they can’t be ignored. We should pay much attention to them.
1. The writer doesn’t think that youth is_ .A.the best time of our lives | B.the most difficult time of our lives |
C.the time to make some important decisions | D.the time to get a job |
A.they are seldom understood by others |
B.they become confident of their position |
C.they still seem little in some parents’ eyes. |
D.they still consider themselves to be children. |
A.理解 | B..理睬 | C.忽视 | D.发现 |
A.They consider it to be a natural need | B.Their friends advise them to do so |
C.They wish to be “cool”. | D.They want to relax themselves. |
A.Things are not easy nowadays for teenagers, but for adults. |
B.Teenagers have to be well educated in order to get a really good job in the future. |
C.Teenagers don’t have to make some important decisions which will influence their future life, because their parents can do these for them. |
D.We shouldn’t pay much attention to the problems that the teenagers have. |
【推荐2】People often ask me for suggestions about how to learn English. Everyone's different, of course, but I thought I'd share(分享) some of my experiences. I once took a school year English course in Wuhan University, but I mostly learned English on my own.
One thing I can tell is, once you’ve started learning, you should try to think in English as much as you can. When you’re riding your bike, or walking down the street, just think about “how would I say them in English?”At first, it will be with simple words or phrases, but later you should be thinking about bigger phrases and sentences. Now when I'm in America, for the most time, I just think in English, and speak it directly. It’s amazing how much this helps.
For several years after I started learning, I was often afraid of trying to speak English with others because I didn’t want to make mistakes. Finally I got over it. And while traveling in America, I’d try to hang out with friends who spoke no Chinese, so I’d have no choice but to use English. And I decided that if I said something stupid and other people laughed, so be it. My English started improving more quickly after that.
It may be a good idea to ask any of your American friends to look at the way you’re writing the characters, and give some suggestions for improvement.
1. The writer learned English in Wuhan University for about .A.a week | B.a month | C.a term | D.a year |
A.thinking in English | B.learning English grammar |
C.watching English | D.reading English books |
A.turn it on | B.depend on it | C.overcome it | D.understand it |
A.in the university | B.in the middle school |
C.in China | D.in America |
A.The importance of English | B.My English learning experience |
C.My university life | D.American friends |
【推荐3】I can’t remember the date when I started collecting litter. But it was when I got tired of seeing litter near my home and realized that nobody else was going to pick it up.
I live close to a forest in Ohio, America. I can walk there within three minutes! I used to love going there to play with my dog. But one day there was so much litter there that I became very unhappy. I decided to clean up the forest.
I made my first trip to clean the forest one afternoon. I took a big black rubbish bag with me. Ten minutes later, my bag was full of cans, bottles, broken glass and newspapers.
Since that first trip three years ago, I’ve been to the forest four times a year to pick up litter. I’m often there for three hours. It makes me feel great to do something for the environment.
After each trip, I look at all the litter I’ve found. If any of it is recyclable(可回收的),I’ll keep it. I can’t understand why people drop litter. But I will keep picking it up until they stop dropping it.
I know I can only do a small bit to help the earth, but I still think it is important.
1. When did the writer begin to collect litter?A.When he was very young. |
B.After his home moved to a new place. |
C.When he got tired of seeing litter near his home. |
A.He lives in a forest. |
B.He lives in a place with much litter. |
C.He lives near a forest. |
A.in order to make the place clean |
B.in order to make fun |
C.in order to make money |
A.In the forest | B.In the street | C.In the park. |
A.the writer always collects a lot of litter |
B.the environment will be more beautiful if everyone tries to protect it. |
C.the writer will go on collecting litter. |