Nearly all our food comes from the soil（土地）. Some of us eat meat, of course, but animals live on plants....

题型：阅读选择题类：常考题难易度：普通

Nearly all our food comes from the soil（土地）. Some of us eat meat, of course, but animals live on plants. If there were no plants, we would have no animals and no meat. So the soil is very necessary for life. The top of the ground is usually covered with grass or other plants. There may be dead leaves and dead plants on the grass. The waste matter（粪）from animals also falls on it.
All soil needs food. If we do not give it any, the plants will be weak. Farmers found that animals' waste is the best food for the soil, but chemical fertilizers（化肥）are also very useful. The same crop（庄稼）should not be grown in the same place every year, it's better to have a different crop. A change of crop and the use of a good fertilizer will keep the land good.

（1）、Which of the following is true?

A、All our food comes from the soil. B、Most of our food comes from soil. C、None of our food comes from the soil. D、All our food comes from animals.

（2）、What does the writer tell us in the first paragraph?

A、Leaves, plants, grass and waste live on each other. B、There would be no animals without meat. C、There would be no plants without animals. D、People, animals, plants and soil live on each other

（3）、Which is the best food for soil in the field?

A、Chemical fertilizers. B、Plants and grass. C、Animals' waste. D、Different crops.

（4）、Why do we often grow a different crop in the same place every year?

A、Because we can keep the soil rich this way. B、Because we don't have enough land. C、Because we want to have a different food. D、Because we do this as a habit（习惯）.

举一反三

Being safe in your everyday life needs knowledge. you remember the following information，your life will be much safer.
● Always notice the environment around you. You shouldn't walk alone outside late at night. Make sure where the public phones are. If anything dangerous happens，you can find them easily.
●Your bag should be carried towards the front of your body instead of putting it on your back。When a bus is full of people，it is easy enough for a thief to take away the things in the bag on your back.
●If you are followed by someone you don't know, cross the street and go to the other way, let the person understand that you know he or she is after you. Next，don't go home at once. You are safer in the street than you are alone in your home or in a lift.
●If you have to take a bus to a place far away, try to get to the stop a few minutes earlier before the bus leaves. On the bus，don't sit alone. Sit behind the driver or other people. Don't sleep.

Rivers are one of our most important natural resources(资源). Many of the world's great cities are located on rivers, and almost every country has at least one river running through it that plays an important part in the lives of its people.
Since the beginning of history, people have used rivers for transportation. The longest one in the United States is the Mississippi. The lifeline of Egypt is the Nile. To the people of India, the Ganges is great, but it is also important for transportation; ships can travel along it for a thousand miles. Other great rivers are the Congo in Africa and the Mekong in southeastern Asia. The greatest of all for navigation（航海）, however, is the Amazon in Brazil（巴西）. It is so wide and so deep that large ships can go about two thousand miles up it.
Besides transportation, rivers give food to eat, water to drink, water for crops, and chances for fun. In order to increase the supply(供给) of water for crops, engineers sometimes build a dam (大坝)across a river and let a lake form behind the dam. Then people can use the water not only to irrigate(灌溉) their fields but also to make electricity for their homes and industries.
However, large cities and industries that are located on rivers often cause problems. As the cities grow in size and industries increase in number, the water in the rivers becomes polluted with chemicals and other materials. People are learning the importance, however, of doing more to keep their rivers clean if they want to enjoy the benefits of these natural resources.

阅读理解

Every single one of us can help to deal with climate change and prepare for the effects.

We all have an effect

on the environment through our use of resources (资源) and burning fossil fuels for everyday activities such as driving cars and heating our homes. If we all do our best to protect our environment, then we can make a real difference.

Consider the environmental effects of:

1 the energy used in your home

2 the way you travel

3 the food you eat

Do everything you can to reduce your carbon footprint (足迹) and not only will you be making fewer effects on the environment, but you511 probably find that you'll also save money and lead a healthier life.

Increasing water efficiency in your home reduces the amount of energy used for water treatment and can save money and fight against climate change at the same time.

Other things you can do

Here's a list of some simple things you can do that will help reduce your carbon footprint:

1 insulate (使隔热) your home

2 turn down your central heating by one degree (度数)

3 use energy efficient lighting

4 try not to fly

5 share a car with others

6 ride your bike for short journeys

7 eat local, seasonal, fresh, unprocessed (未加工的) food

8 reduce the amount of waste you produce and reuse or recycle as much as you can

阅读下面短文，从每题所给的A、B、C、D四个选项中选出最佳选项。

Can dolphins (海豚) talk? Maybe they can not talk with words, but they can talk with sounds. They show their feelings with sounds. Dolphins travel in a group. We call a group of fish a "school". They do not study, but they travel together. Dolphins are mammals (哺乳动物), not fish, but they swim together like fish in a school. Dolphins talk to the other dolphins in the school. They give information to the others. They talk when they are happy, sad or afraid. They say "welcome" when a dolphin comes back to the school. They talk when they play.

They make some sounds above water. They make many more sounds under water. People cannot hear these sounds because they are very, very high. Scientists make tapes of the sounds and study them. Sometimes people catch dolphins for a large aquarium (水族宫). People can watch dolphins in a show. Dolphins do not like to be away from their school in an aquarium. They are sad and lonely. There are many stories about dolphins. They help people. Sometimes they save somebody's life. Dolphins' meat is good, but people do not like to kill them. They say that dolphins bring good luck. Many people believe this.

阅读理解

In our daily life, robots are often found to do work that is too dangerous, boring, difficult, or dirty. And we often see kids play with toy robots.

But what exactly is a robot? There are some important characteristics(特征) that a robot must have. These characteristics might help you to decide what is and what is not a robot. It will also help you to decide what you will need to build into a machine before it can be considered as a robot. A robot has these important characteristics.

Sensing First of all, your robot would have to be able to sense the environment around it.

Give your robot sensors (传感器): light sensors( eyes ), touch sensors (hands), chemical sensors(nose), hearing sensors(ears) and taste sensors (tongue).

Movement A robot needs to be able to move around its environment. It can move on wheels, walk on legs or be driven by small engines(发动机). A robot can move either the whole body or just parts of it.

Energy A robot needs to be able to power itself. Some robots might power itself with sunlight, some might with electricity, while others with the battery(电池). The way your robot gets its energy will depend on what your robot needs to do.

Intelligence A robot needs some kind of "smarts". A programmer is the person who gives the robot its "smarts". The robot will have to have a certain way to receive the program so that it knows what it is to do.

阅读理解

Today, roller skating (滑旱冰) is easy and fun. But many years ago, it wasn't easy at all. Before 1743, people never tried skating on wheels. That changed because of a man named John Joseph Merlin. Merlin's work was making instruments. In his free time he liked to play the violin. Merlin was a man with many ideas and many dreams. People called him a dreamer.

One day Merlin received an invitation to go to an important party. He was very pleased and a little excited. As the day of the party came near, Merlin began to think. He wanted to find a way to make a wonderful entrance at the party. Merlin had an idea. He thought that he would attract a lot of attention if he could skate into the room.

Merlin tried different ways to make himself roll. Finally, he decided to put two wheels under each shoe. These were the first roller skate shoes. Merlin was very proud of them. He dreamed of arriving at the party and skating into the room while playing the violin. He was sure that everyone would be very surprised.

On the night of the party Merlin rolled into the room, playing his violin. Everyone was really surprised to see him. There was just one problem. Merlin had no way to stop his roller skating. He rolled on, playing the violin. Then, with all eyes on him, Merlin hit into a huge mirror on the wall. The mirror broke into many pieces with a very loud noise. But nobody forgot Merlin's wonderful entrance after that.

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