There is nothing worse than sitting next to someone and being able to smell their breakfast! In ancient China, people used to chew a special plant to make their breath smell better. Now, we use gum (口香糖) to make sure our breath doesn’t bother other people.
In fact, how your breath smells says a lot about your health. According to BBC News, scientists can now tell whether somebody has certain diseases just from a simple breath test. How does it work? Breath is made up of something known as “metabolites (代谢物)”. Metabolites are a kind of waste that the body makes. Scientists from the Swiss Federal Institute of Technology found that metabolites are unique (独特的) to each person’s breath. They are just like people’s fingerprints (指纹). That’s why scientists sometimes call them “breath prints (呼吸指纹)”, the Daily Mail reported.
Compared to other kinds of tests, a breath test is much quicker. It only takes a few minutes. Breath tests are also much easier to do. People don’t need a needle (针) or a container (容器) to hold body fluids (体液). They just need to blow into a special machine. This machine will help to test their breath. It has been useful in finding early signs of diseases, such as stomach cancer.
Scientists are doing further research on breath tests. They think that these tests could be used for athletes to see if they are cheating.
1. What does the underlined word “bother” mean?A.Make others happy. | B.Make others excited. |
C.Make others upset. | D.Make others relaxed. |
A.we have different metabolites in our breath | B.we get diseases from the things we eat |
C.each of us has diseases | D.each of us has different fingerprints |
A.It’s much cheaper to do a breath test than other tests. |
B.A breath test can help doctors figure out why people are sick. |
C.To do a breath test, people need to blow into a special machine. |
D.Breath tests is often used to see if athletes are cheating. |
A.How to take a breath test | B.Why does your breath smell bad? |
C.What can your breath say about you? | D.How to make breakfast smell better. |
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【推荐1】Plants grow everywhere. Most plants grow best in spring and summer because the weather is warm and there is a lot of rain. When autumn arrives, plants grow slower. Some may even die before winter comes. In autumn, their leaves turn yellow and fall off. Without leaves, plants will lose less water. It can help them live during winter.
Each plant has its own habitat(生活环境). It is very important to them. They need a certain temperature(温度), sunlight and humidity level(湿度). When their habitat is destroyed, they may die. Nowadays, human activities cause a lot of pollution. This is bad to the growth of plants. For example, the greenhouse effect(温室效应)and acid(酸的)rain are destroying the forest. Lots of plants have died.It is telling us to fight against air pollution.
However, many people don’t know that forests are the lungs(肺)of our Earth. We must protect the environment and that is protecting ourselves.
1. Why do plants grow well in spring and summer? _________
A.Because there is less rain. |
B.Because the leaves fall off. |
C.Because the sun shines brightly. |
D.Because it is warm and rainy. |
A.Plants will lose more water. |
B.Plants will lose their lives at once. |
C.Plants will keep more water. |
D.Plants will cause much pollution. |
A.All the plants will die in the cold winter. |
B.Air pollution is mainly caused by acid rain. |
C.The greenhouse effect is harmful to forests. |
D.Most people know the importance of forests. |
A.Plants can grow everywhere on Earth. |
B.The water is quite important to plants. |
C.Greenhouse effect is getting worse. |
D.Habitat is very important to plants. |
【推荐2】You change into your pajamas, turn off the lights, and get yourself ready to sleep. How do you prefer to sleep, on the back or on your side? Here are some interesting sleeping positions.
![]() | Starfish Starfish is when you lie on your back and sleep with your arms lifted up near your head. According to studies, only 5% of people sleep like this. It often causes lower back pain. You can place a pillow(枕头)under your knees if you have lower back pain. You will feel more comfortable this way. |
![]() | Soldier Position This sleeping position is kind of strange, but very common. It’s when you sleep on your back with your arms down and very close to your body. Studies have shown that people who sleep like this may be quieter. It is actually a good sleeping position, as it helps keep your spine (脊柱) in a straight line. |
![]() | Sleeping on Your Belly Do you like to sleep on your belly, but experience problems oftentimes? The position might not help you. It can make your neck uncomfortable. But if this is how you like to sleep, you might consider using a very soft cooling pillow to keep your neck comfortable. |
![]() | Freefall If this sleeping position is not familiar to you, you should know that at least 7% of the world’s population sleep that way. In this position, you have your hands on or around your pillow, with your head turned to one side. But it may create a twist (扭伤) in the neck. Some studies suggest that generally you’re a social person if you like to sleep in this position. |
A.Starfish. | B.Soldier Position. | C.Sleeping on Your Belly. | D.Freefall. |
A.you fall asleep quickly | B.keep your spine in a straight line |
C.you breathe easily | D.treat the pain in your neck |
A.social | B.quiet | C.honest | D.careful |
![](https://img.xkw.com/dksih/QBM/2022/7/5/3016156996698112/3021688329355264/STEM/96411dab4e9d44ab983c53dadec29a22.png?resizew=105)
Look at the bus. It’s a little different from other buses. It’s black and white, and has two black “ears” on the top, just like a giant panda. The lights of the bus are its “eyes”. This is the popular Panda Bus in China. The bus is 12 meters long and there are 23 seats on it.
The Panda Bus is popular not just because of its cute looks. You can also find something cool when you get on it. First of all, it’s very easy for people to buy tickets. They don’t need to use their phones or bus cards like before. All they need are their hands. They can buy tickets just by scanning(扫描)their hands. In this way, people can also buy drinks and food on the bus. There is a vending machine(自动贩卖机)in the middle of the bus. Another surprise is the small computer on the back of each seat. People can choose to watch a movie on the way. How interesting! There are also some cameras on the bus. If someone steals(偷)things, these cameras will catch them. So, it’s safe and comfortable for people to take the bus. Most importantly, the bus is driverless(无人驾驶的). It can stop at lights and park at the stop all by itself. It only needs someone to watch all the way just in case. And it usually runs a little slower than other buses.
By the end of 2021, there had been over ten cities in China having the Panda Bus, such as Tianjin, Shanghai and Jinan. Would you like to take such a bus to go to school?
1. The first paragraph mainly tells us ________ about the Panda Bus.A.how it works | B.what it looks like |
C.how popular it is | D.why it is so different |
A.They scan their hands. | B.They use paper money. |
C.They use phones. | D.They use bus cards. |
A.it’s big and beautiful |
B.the cameras can help people a lot |
C.people can use the small computers to relax |
D.people can take drinks and food onto the bus |
A.There isn’t a driver on the bus. |
B.Only big cities in China have the Panda Bus. |
C.The Panda Bus doesn’t run as fast as other buses. |
D.People can only use the small computer to watch movies. |
A.take photos | B.watch the way | C.stop it at lights | D.keep safe |
【推荐1】What kind of chores do you usually do around the house? Maybe you clean your room, wash the dishes or sweep the floor. All these are indoor chores.
But in many places, especially in rural areas in the US, kids have different outdoor chores during different seasons.
In fall, the most common outdoor chore is sweeping leaves. Trees lose their leaves in fall. It is up to each family to put the leaves in big trash bags.
After a heavy snowfall in winter, children help clear snow in the front yard. Otherwise, it may be hard for family to leave their homes.
Spring and summer bring lots of rain and sun, which makes the grass in people’s yards grow tall. It is common for kids to mow (割草) their yards to keep them fresh and neat.
Doing all these chores might sound like a lot of work. Most families give their kids a little bit of money for doing them. People who don’t have children might even pay neighborhood kids to do it.
1. How many indoor chores are mentioned in Paragraph 1?A.Two. | B.Three. | C.Four. | D.Five. |
A.washing cars | B.walking dogs | C.sweeping leaves | D.mowing yards |
A.they like to keep their yards clean and neat | B.grass won’t grow if snow is on it |
C.it is a traditional winter outdoor activity | D.the snow might get in their way |
A.ways of getting money in the US | B.different outdoor chores in the US |
C.activities in different seasons in the US | D.why people in the US have yards |
【推荐2】New York, London, Paris and other big cities are exciting places to live in. Some people enjoy living in big cities, but some people don’t. In big cities, there are many interesting things to see and do. You can see many kinds of museums, plays and films. You can also buy things from all over the world. But there are many problems in big cities, too. It’s expensive to live there. The population of the big cities is getting larger and larger. Many people study at good schools or universities, but sometimes these people can’t find good jobs or good places to live in. Also, it is hard to keep the cities safe and clean. Those are big problems.
根据材料所提供的信息,判断下列句子正误。
1. All the people like living in big cities.
A.Right. | B.Wrong. |
A.Right. | B.Wrong. |
A.Right. | B.Wrong. |
A.Right. | B.Wrong. |
A.Right. | B.Wrong. |
【推荐3】Tea is a favorite drink of people all over the world. It has a long history with more than 4000 years. Today about 2,000,000,000 people around the world drink tea. Tea becomes a very important drink in everyday life.
According to (根据) the ways of making tea, tea is classified into white tea, green tea, black tea and yellow tea. Some people like drinking tea at home, but some like drinking in other places, such as (例如) tea houses and offices.
Tea culture (文化) is very different in many countries. In the USA, many people drink black tea, but in the south (南方) of the USA, people like to drink sweet tea. Sweet tea is cold black tea with some sugar in it. People also drink a lot of tea in England. Every afternoon, at about three or four o’clock, it’s “tea time”. Families or friends can talk with each other while having afternoon tea. English people like to drink their tea with milk in it.
Tea is not just a hot drink. Some people think it is very delicious. Some drink it because it makes them feel not so tired. And some think it helps lose weight (减肥). In China, people are good at using tea to make some delicious food, such as tea eggs and Dragon Well Tea Shrimp (龙井虾仁) .
根据语篇内容,选择最佳选项。
1. How does the writer start the passage (文章)?
A.By telling stories. | B.By giving numbers. | C.By showing pictures. |
A.利用 | B.分类 | C.储存 |
A.They dance or sing. |
B.Drink cold black tea with some sugar in it. |
C.Have a talk with their families or friends. |
A.To tell us tea makes people not so tired. |
B.To tell us tea has a long history in China. |
C.To tell us Chinese often make food with tea. |
A.The culture of tea. | B.Different kinds of tea. | C.Different food with tea. |