1 . Have you ever seen a bee fly busily? Do you think the bee is just flying around? Actually, the bee is hard at work.
Bees spend a lot of time looking for food. But not all the bees in the hive(蜂巢) have this work. Bees can be divided into three kinds—a queen bee, drones(雄蜂), and worker bees. The queen bee is very important. She is the mother of all the bees that live in the hive. Worker bees do all the other work in the hive. Besides looking for food, they make and clean the hive. They also take care of the queen and protect her.
Bees make dance-like movements inside the hive to send messages about food. They use different movements to give different kinds of information. They tell where food can be found and how far away it is from the hive. Bees can even share how much food there is and how good it is.
And surprisingly, a new research has found that a group of bees could generate an amazing amount of electricity by beating their wings more than 200 times per second. And the amount of electricity could reach 100 to 1,000 V(伏). That’s eight times greater than the electricity a storm cloud can produce.
Scientists found that the denser(密集的) the cloud of bees is, the bigger the electrical field is. Based on these findings, the team recorded that bees—which group in huge, dense clouds—could have an influence similar to that of a storm. Further research is needed to find out how electricity influences the bees and their environment.
根据材料内容选择最佳答案。
1. Why does the writer ask two questions in Paragraph 1?
| A．To find the answers. | B．To present the argument. |
| C．To interest the readers. | D．To show the latest research results. |
a. Make the hive. b. Look for food.
c. Look after the queen. d. Give birth to the baby bees.
| A．a, b, d | B．a, b, c | C．b, c, d | D．a, c, d |
| A．By making noise. | B．By spreading smell. |
| C．By producing electricity. | D．By using different movements. |
| A．利用 | B．产生 | C．切断 | D．输送 |
A． | B． | C． | D． |
2 . Have you ever been lucky enough to see an owl (猫头鹰) in the wild? If it was small and brown with white spots, it could have been a burrowing (穴居) owl. These owls are found across North America.
The burrowing owl got its name because of how it makes its home. This owl does not build a nest in a tree. Instead, it nests in holes. The holes are under the ground, called burrows.
It is important to protect the burrowing owl so that it does not become endangered. In several states, the burrowing owl is listed as a “bird of special care”. That doesn’t mean it is endangered yet. If it continues to decrease in numbers though, it will be at risk of dying out in the future. There are fewer burrowing owls today than there were in the past because of a few different reasons. Cities have spread across land once used for farming. As a result, the owls lose their living places, or natural homes. In areas used for farming, large machines can destroy their nests under the ground.
People can help save the burrowing owl in a few different ways. They can talk to their family members and friends and tell them not to destroy any burrows. People can put up signs to tell that owls are nesting in the area. They can also encourage others not to use pesticides (杀虫剂) in gardens to kill insects because burrowing owls eat insects and may be influenced. We all can do our part to make sure the burrowing owl is here to stay for many years to come.
根据材料内容选择最佳答案。
1. What can we know about burrowing owls?
| A．They are white with black spots. | B．They are one of the smallest owls. |
| C．They can only be found in America. | D．They don’t live in trees but in holes. |
| A．Seem harder. | B．Seem easier. | C．Become smaller. | D．Become bigger. |
| A．Two. | B．Three. | C．Four. | D．Five. |
A． | B． | C． | D． |
| A．Something about the burrowing owl | B．How the burrowing owl got its name |
| C．Why we must protect the burrowing owl | D．Some useful ways to protect the burrowing owl |
3 . Air pollution is a killer. The World Health Organization says it kills about seven million people around the world each year.
The researchers studied about 25,000 people from across China. The youngest people in the study were 10 years old, while the oldest was 90.
Chen said that the effect generally is worse for those over 64 years of age, for men and for those with little or no education. “The older persons are more influenced. And we find, quite interestingly, males are more influenced than females.
The researchers reported that long-term exposure（暴露）to air pollution can influence a person’s mental abilities in two areas.
根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使文章意思通顺、内容完整。
| A．They are language and math. |
| B．They came from 25 of China’s 34 provinces. |
| C．Even if polluted air does not kill us, it can make us sick. |
| D．And people working outdoors are more influenced than people working indoors. |
| E．A new study shows that air pollution can cause a “huge” reduction in our intelligence（智力）. |
| since write power usual for reply mean correct lucky they |
In Chinese culture, the color red stands for many good things, for example, happiness. But writing names and letters with red pens is
In ancient times, red was the symbol of
Writing with red pens was also related to death. In ancient China, the criminals who were sentenced to death signed
Nowadays, red pens are used
Energy is the ability to do work. Solar energy comes from the Sun. There is also energy that comes from wind and water.
But do you know that energy can come from people, too? When you pedal a bike, you produce energy. You use your legs to push the pedals. Your energy is transferred (转移) to the bike. That makes the bike move.
Now imagine riding your bike to create enough power to run a computer. Some students at one school did just that! They jumped on bikes connected to generators (发电机) and pedaled in place. Soon they were producing electricity. This energy is needed to run their computers.
Here is how bicycle-powered energy works. When a student pedals the bike, the back wheel spins. The wheel spins the generator. The generator produces electricity. As long as a student pedals the bicycle, electricity moves through the generator. The electricity can be used right away. This energy can also be stored and used later.
People use bicycle-powered energy to run small devices (设备) such as small televisions and fans. They often use less than 100 watts per hour. However, it would be a mistake to use pedal power to run a fridge. This large machine often uses more than 700 watts per hour. The electricity for these machines comes from power lines overhead or underground.
Pedal power can be seen in schools, gyms, and homes. What a fun way to provide electricity!
根据材料内容选择最佳答案。1. How does the writer lead into the topic “bicycle-powered energy” in Paragraph 2?
| A．By asking a question. | B．By telling a joke. |
| C．By using an old saying. | D．By making a survey. |
| A．Falls down suddenly. | B．Breaks up completely. |
| C．Moves up and down slowly. | D．Turns round and round quickly. |
| A．The future of new energy. | B．The forms of world’s energy. |
| C．Using bicycle-powered energy. | D．Producing bicycle-powered energy. |
| A．It can’t be seen in schools. | B．It comes from wind and water. |
| C．It can be stored and used later. | D．It’s from power lines overhead. |
| A．Unit 1 Friends Forever | B．Unit 2 Dream of the Stars |
| C．Unit 3 The Value of Money | D．Unit 4 The World of Science |
6 . There’s nothing quite like falling sound asleep after a full day of work. Like people, animals need to rest after working hard. Some animals sleep in water. Others dig holes under the ground. Some even sleep high in trees or under leaves. But they all find a way to rest.
Some animals in the sea sleep in strange ways. Fish sleep with their eyes open. They seem to look ahead far into the sea while they rest. Sea otters sometimes sleep in beds of the plants that grow in the sea. This keeps them from moving away. Parrotfish blow something from their mouths when they are ready to sleep. Then a bubble (气泡) will be formed around them. The bubble protects them from harm while they sleep.
Some animals sleep under the ground. Chipmunks (花栗鼠) sleep curled up (蜷缩) in a ball. Their beds are made of leaves and grass. In winter, they sleep for two weeks and wake up to eat the stored food. Then they go back to sleep for another two weeks before waking up again. Some desert frogs dig underground holes during the hot, dry season. A frog may stay in its hole for months.
High above the ground, monkeys find leafy places in trees each evening before they sleep. The tall trees help to keep monkeys safe during the night. Some insects even sleep under the leaf that will be their next meal. A bee may climb down into a flower to rest. When it climbs out the next morning, it is rested and ready for work.
根据材料内容选择最佳答案。1. What animals blow bubbles when they sleep?
| A．Sea otters. | B．Monkeys. | C．Desert frogs. | D．Parrotfish. |
| A．They rest with their eyes open. |
| B．They never sleep curled up in a ball. |
| C．They wake up now and then in winter. |
| D．They don’t eat any food during the winter. |
| A．The forest where monkeys sleep safely. |
| B．The animals that sleep above the ground. |
| C．The reason why bees climb down into flowers. |
| D．The ways that keep animals away from danger. |
A． | B． | C． | D． |
| A．Where animals live? | B．Why animals move? |
| C．How animals sleep? | D．What animals feed on? |
7 . Every living thing needs to reproduce. Reproducing means creating more members of your group. In order for plants to reproduce, they have to spread their seeds (种子) to other areas. Plants have developed all kinds of ways to do this.
The simplest way is gravity. Many seeds are inside of fruit. When a piece of fruit gets too heavy, it falls from a tree to the ground. Sometimes animals will pick up the fruit and drop it in another area. That helps move the seed even farther away. Apples spread this way.
Other plants use wind to spread their seeds. Dandelions are a good example of this. Dandelion seeds are so light that when wind blows, it carries dandelion seeds to new places. Maple (枫树) seeds also use wind. Their seeds are connected with long, thin leaves that look like wings. When the seed falls from the tree, its “wings” help it fly farther from the tree.
Some animals help plants spread their seeds. The animals eat the seeds. While the seed is in the animal’s body, it stays whole. When the seed leaves the animal, it’s in a new place.
Ants also help spread seeds. Some seeds have a special smell that attracts ants. The ants bring the seeds back to their home, which of course is underground. They only eat part of the seed. They leave the rest of the seed underground. After that, the seed can start growing.
根据材料内容选择最佳答案。
1. What does the word “gravity” mean in the second paragraph？
| A．The action that makes animals drop seeds. |
| B．The help that moves seeds even farther away. |
| C．The need that comes from animals and plants. |
| D．The force that causes fruit to fall to the ground. |
| A．They use ants. | B．They use wind. |
| C．They use smells. | D．They use animals. |
a. They only eat part of the seed.
b. They help seeds fall from the tree.
c. They carry seeds to the underground home.
d. They pick up the fruit and move it far away.
e. They leave the rest of the seed underground.
| A．b, d, e | B．a, b, d | C．a, c, e | D．b, c, d |
| A．Nature. | B．Culture. | C．Education. | D．Technology. |
| A．How Plants Spread Seeds? | B．Why Animals Pick Up Seeds? |
| C．How Wind Helps Seeds Spread? | D．Why Seeds Have a Special Trip? |
8 . Cait, 11, was trying to fall asleep when her 8-year-old brother, Doug, came into her room. He looked around, but seemed really out of it. Then Doug went back into the hallway and stood there looking straight up at the light. This was really strange. Cait didn’t know what to do. Just then, Cait’s father appeared and explained Doug was sleepwalking.
Not all sleep is the same every night. We experience some deep, quiet sleep and some active sleep, which is when dreams happen. You might think sleepwalking would happen during active sleep but a person isn’t physically active during active sleep. It usually happens in the first few hours of sleep in the period called deep sleep.
The truth is that not all sleepwalkers walk. Some simply sit up or stand in bed or act like they’re awake when, in fact, they’re asleep! Most, however, do get up and walk around for a few seconds or for as long as half an hour.
Sleepwalkers’ eyes are open, but they don’t see the same way they do when they’re awake. They tend to go back to bed on their own and won’t remember it in the morning.
You also might have heard that sleepwalkers can get frightened if you wake them up. That’s true, so what do you do if you see someone sleepwalking? You should call for a grown-up who can lead the person back to bed. And once the sleepwalker is tucked back in bed, it’s time for you to get some sleep, too!
| Word Bank tend 倾向于 frightened 受惊的 tuck 掖好被子 |
1. What does “out of it” most probably mean in Chinese?
| A．茫然不觉 | B．心满意足 | C．垂头丧气 | D．悠然自得 |
| A．During active sleep. | B．In the first few hours of sleep. |
| C．When dreams begin. | D．When we're trying to fall asleep. |
| A．①② | B．②③ | C．③④ | D．④⑤ |
| A．Wake them up. | B．Walk around with them. |
| C．Do nothing and get your own sleep. | D．Ask grown-ups to lead them to bed. |
| A．Teachers. | B．Doctors. | C．Parents. | D．Children. |
9 . You may think,salt is just a simple cooking material that gives our food a little extra taste.
Do you think rubbing salt in the wound will be useful?
Early humans got the salt they needed to stay alive from the animals they killed . But the improvement in farming led to a diet low in salt . So, humans needed to find other sources . Those who lived near the ocean or other natural sources for salt were lucky while those who did not had to trade for salt.
Salt also played an important part in population movement and world exploration. Explorers understood that if they could keep food fresh , they could travel longer distances .
A person might also be called "salt of the earth" .
根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使短文意思通顺、内容完整，并将其标号填写在下面题号后的横线上。
| A．However, salt is much more than that. |
| B．It means that you can depend on or trust the person . |
| C．So they used salt to preserve food and explored the world. |
| D．That would be painful and would make the wound more serious. |
| E．In fact , people used salt as a method of payment in the ancient world. |
The camels can carry heavy goods across the desert. They walk without stopping for food or water for days.
A camel can take
| Word Bank Hump驼峰 litre公升 oasis 绿洲 |
