1 . Want to have a cold drink during summer? “Ouch!” Suddenly your teeth begin to ache. If eating ice-cream or drinking cold drinks makes your teeth ache, it could be something called TRPC5.
A new study came out on March 26, 2021. It answered a long-lasting question about teeth—why do cold food and drinks make our teeth ache? Actually, it means that our tooth enamel (牙釉质) might have been broken. The team discovered the TRPC5 15 years ago, but they didn’t know which part of the tooth could feel the change of temperature. Now they know it—it’s in the tooth enamel.
David Clapham from the team showed how teeth feel cold. When someone is eating ice-cream, for example, cells(细胞) with TRPC5 in teeth feel a change in temperature and then send information to the brain(大脑). The team also found that there is more TRPCS in bad teeth. So we should protect our teeth.
“Toothache has long been a problem,” Clapham said. “But it is important and it influences a lot of people. Toothache is nothing until you get it.” The team believed this study could help develop more useful medicine for toothache.
判断句子正误。正确的涂“A”，错误的涂“B”。
1. This passage tells us to be careful about cold drinks because we may have a stomachache.
2. The team knew which part of our tooth could feel the change of temperature as soon as they discovered the TRPC5.
3. The following picture shows how our teeth feel cold.
4. The underlined sentence advises us to protect our teeth before it’s too late.
5. This study is very useful and can help people lower the risk of having a toothache.
2 . If you go to a fast food restaurant, you will probably see a lot of teenagers. Today, many teenagers are overweight, and some of them are because of their bad eating habits. Most teenagers love food with a lot of fat, oil, salt and sugar. People often call this kind of food “junk food”.
But bad eating habits go beyond fast food. We find many teenagers eat unhealthily. Some don’t have breakfast before they go to school. During the day, some don’t have a proper meal for lunch. In a recent survey at one school, scientists found that over two thirds of the students didn’t follow a healthy diet. They didn’t like vegetables, and many of them didn’t follow a healthy diet. They didn’t like vegetables, and many of them didn’t like fruit. They preferred to eat food with a lot of salt, sugar, or fat.
Parents today also worry about their children’s diet. Some doctors give the following advice:
◆Teenagers shouldn’t eat too much junk food.
◆Teenagers shouldn’t eat food with too much salt. Salt can cause high blood pressure in the future.
◆Teenagers should eat food with less fat, oil, and sugar.
◆Teenagers need to eat some fruit and vegetables every day. Fruit and vegetables are rich in vitamins and have little fat.
◆Teenagers need to drink more milk. Milk will help their bones grow.
◆Teenagers need to eat breakfast every day. This is good for their body and mind.
判断正(A)误(B)
1. “Junk food” contains a lot of fat, oil, salt and sugar.
2. In a recent survey at one school, scientists found many students like fruit.
3. The underlined word “beyond” means “相等” in Chinese in this passage.
4. In this passage, doctors think the teenagers should eat more food with no vitamins.
5. The best tile for this passe is “Advice On Teenagers Healthy Eating”.
3 . Almost every day, we discuss the topic of health, especially for kids. But what is health? “Health” means eating well, getting enough exercise, and having a healthy weight. Let’s read the following rules. They can help you stay healthy.
Eat a variety of food, especially fruit and vegetables. We all know that eating fruit and vegetables can help us stay healthy, but many of us only eat our favorite food. Remember that we can only get the nutrition (营养) we need by eating different kinds of food, especially fruit and vegetables.
Drink water and milk most often. Everyone knows that water is important. Besides that, kids need plenty of calcium (钙) to grow strong bones, and milk is rich in it. Every day, you should drink at least three cups of milk, when you are 9 years old or older. You should also try to have less sugary drinks, like soda and coca. They include a lot of sugar. Sugar only includes calories (热量), not important nutrition.
Listen to your body. When you are eating, notice how your body feels. When your stomach feels comfortably full, stop eating. Eating too much makes you feel uncomfortable. If you do it too often, it can make you unhealthy and fat.
Limit screen time. What’s screen time? It’s the amount of (大量的) time you spend watching TV, movies and playing computer games. The more time you spend on these sitting-down activities, the less time you spend playing sports, like basketball, and doing other activities like riding and swimming. Try to spend no more than 2 hours a day on screen time.
根据短文内容，判断下列句子的正（A）或误（B），并在答题卡的相应位置将其涂黑。
1. In this passage, “health” includes eating well, doing more exercise and wearing comfortable clothes.
2. The underlined word “variety” means “各种” in Chinese.
3. We should spend the same time on both sitting-down activities and sports.
4. Screen time is the time that you only spend watching movies.
5. The writer wants to tell us some suggestions for staying healthy in this passage.
4 . In Japan, people eat their food with chopsticks. Dishes there are carefully cooked. At mealtime, dishes are placed in the centre of a table and each person helps himself or herself.
The traditional (传统的) Japanese food mainly includes rice, fish and vegetables. Rice is important food in Japan. There is much fresh fish and other seafood in the country.
This is because no place in the country is too far from the sea. Many different kinds of fish are found in the sea around Japan. Japanese fishermen use modern fishing methods (方法) to catch fish and Japan is one of the countries that catches the most fishes in the world.
As their food is so healthy, it is not surprising that most Japanese can live longer.
True or False.
1. Japanese use chopsticks to eat their food.
2. Most Japanese only eat fish and rice for meals.
3. Many kinds of fish are found in the sea around Japan.
4. Japanese fishermen catch fish in a simple way.
5. Healthy food can help people live longer.
5 . Scientists say there are seven kinds of food that people should eat every day. They are: (1) green and yellow vegetables of all kinds; (2) citrus (柑橘类) fruits and tomatoes; (3) potatoes, other fruits and vegetables; (4) meat of all kinds, fish and eggs; (5) milk and food made from milk, like cheese and ice-cream; (6) bread or cereal (谷类) (rice is also in this kind of food) ; (7) butter or something like butter with fat (脂肪) .
People in different countries in the world eat different kinds of things. In some places, people eat once or twice a day; in other countries, people eat three or four times a day. Scientists say that these differences are not important. It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at 11 o’clock at night. The important thing is that every day a person must eat something from each of the seven kinds of food. The most important thing is that we must find some ways to help the hungry people and make the people have right kinds of food, make them strong and healthy.
根据短文内容，判断正 (T)、误 (F)。
1. Oranges belong to (属于) the third kind of food.
2. In different countries, people eat the same kind of food every day.
3. Scientists say it’s important to have three meals a day.
4. People must eat something from each of the seven kinds of food every day.
5. We should help hungry people and make them strong and healthy.
As a country develops, its people usually enjoy better health care, drink cleaner water and have more food. However, people’s lifestyle is changing at the same time. They have busier lives. They eat more processed food which has more fat, salt and sugar. As a result, the number of people with certain illnesses is increasing.
Diabetes (糖尿病) is an illness that has become more common. According to the WHO, the number of diabetes patients in the world rose by nearly 4% from 1980 to 2014. And the number is still rising.
In the past, diabetes was more common in rich countries. However, in recent years, the number has been rising more rapidly in developing countries. Take China for example, in 1980, less than 1% of the population in China had diabetes, but now more than one in ten Chinese over 18 have diabetes.
It is possible to control diabetes with medicine, but there is no cure. There are things, however, that people can do to avoid it. If they are overweight, they should try to lose weight. They can avoid food high in fat and sugar. They can also exercise often. Besides, they should walk or ride bikes more instead of travelling by car. If all of us change our lifestyle into a healthier one, we may be able to stop the rise in diabetes in the future.
1. Eating food with more fat, salt and sugar will cause certain illnesses.2. The number of diabetes patients has stopped rising.
3. There are more and more diabetes patients in China.
4. Diabetes can be cured with medicine.
5. The healthier lifestyle we choose, the fewer diabetes patients there will be.
When it comes to daily choices, we already have a lot of tasty plant “milks” to choose from, but the latest one, potato milk, is a new one. Potato milk doesn’t sound like the most delicious thing in the world, neither does oat milk (燕麦奶).
If you hope to try potato milk, you’ll be happy to know that you can make it yourself at home. Generally, you just boil the potato, then mix it with the water it is boiled in, strain (过滤) it and add more water until it is what you want.
The only welcome potato milk, recently has been firstly sold on the market. Although some people noticed the potato milk when it was sold, the success of this “milk” still needs time, as some people who have tried it said that it tasted so so, others thought that it tasted a little salty.
But growing potatoes needs less land than growing oats, and it requires little water. Also it has more production than most plants. The new healthy drink may have a huge hill to climb, but it certainly has a chance to become the next big thing.
1. Potato milk is a kind of new plant milk.2. People can’t make potato milk at home.
3. The success of potato milk doesn’t need time.
4. Potato milk may not taste good to some people.
5. The production of potatoes is less than that of most plants.
Peter is a middle school student. He’s quite healthy. But two years ago, he was heavy and often went to see a doctor. He loved chips and chocolate, and got tired easily. He stayed at home all day and didn’t have enough exercise. One morning, he saw some young men running in the park, and they looked really strong. From then on, he thought he should start running.
Now Peter is an active boy. He runs for a long time every morning. He even runs about five miles sometimes. He drinks a milk shake in the morning and eats vegetables every day. He never eats junk food. He looks after his health very well. His healthy lifestyle can help him to study better than before. He says he will keep on running all his life.
1. Peter had enough exercises two years ago.2. One morning, Peter saw some young men swimming in the park.
3. Now Peter is an active boy and runs for a long time every morning.
4. Peter eats vegetables every day but he never eats junk food.
5. Peter’s healthy lifestyle can help him to study better.
Do you often have a cold, headache or sore back? If your answer is “Yes”, your health is a problem. Eating healthy food is a good way to make you healthy. There are different kinds of healthy food. Tofu is one of them. It is also a kind of Chinese traditional food. We like it and usually eat it. Now, many people in other countries think tofu is good for health, too. They also like eating it. Milk is another kind of healthy food. You should drink one or two glasses of milk every day. Vegetables are important, too. You should eat lots of them. There are vitamin (维生素) A, B, C, D, E and other vitamins in them. Of course, it’s important to eat a balanced diet. You need some pork, chicken or beef every day. But you shouldn’t eat too much.
1. If you often have a cold, headache and backache, you aren’t healthy.
2. Tofu is a kind of healthy food.
3. Only Chinese people eat tofu.
4. To keep healthy, we should drink milk every day.
5. We should eat a lot of pork, chicken or beef.
10 . Experts in nutrition (营养) suggest that we should eat at least five different kinds of vegetables and fruit a day. They are very necessary for our health and help our bodies work well. They can help reduce (减少) the risk of getting ill. There are a lot of vegetables and fruit to choose from and they taste delicious. Best of all, you can grow your own!
It’s easy to buy our food from the local supermarket, so why do we go to the trouble of growing our own? Here are several good reasons.
Food that you grow yourself is always fresh. You can pick and eat it at once. When you have tried it, you will agree that vegetables and fruit that are eaten straight from the garden taste better than anything you can buy in a supermarket.
You may want to cut down on your “food miles”— the distance (距离) that a product has travelled before it reaches your kitchen. Many food packages are flown halfway across the earth. That’s not so good for you, or for the planet.
Homegrown food is likely to be healthier. Food producers often use fertilizers (化肥) and pesticides (农药) which can end up in your food. If you grow your own, things are different. You can control what goes on and into the food you eat. You might also choose to grow some traditional vegetables and fruit. These often have more of the vitamins, minerals (矿物质) and protein (蛋白质) that keep you healthy.
If you have a large garden, growing your own is easy. And you can grow your own even if you only have a small backyard or a balcony (阳台). Some food can grow well in pots, including lettuce, tomatoes, potatoes and carrots. You can recycle plastic bottle and cups to grow something. Just make sure there are holes for drainage (排水) and a small plate under them to catch drops of water.
Happy gardening!
根据文章内容，判断句子正(T)、误(F)。
1. Four kinds of vegetables and fruit a day are necessary for our health.
2. People had better eat the vegetables or fruit that they buy in the supermarket.
3. The vegetables and fruit from your own garden taste best according to the passage.
4. Growing your own vegetables or fruit is good for environmental protection.
5. You can’t grow vegetables if you don’t have a small backyard.
