根据短文内容，选择正确答案。E Have you ever seen a horse with toes? Millions of years ago, horses had many toes. ...

题型：阅读选择题类：常考题难易度：普通

牛津深圳版八年级上册Unit 3 Computers单元测试

根据短文内容，选择正确答案。

Have you ever seen a horse with toes? Millions of years ago, horses had many toes. They had four toes on each front foot. They had three toes on each back foot. The horses were no bigger than cats.

These small horses lived in the forest. Their many toes helped the horses run over the soft, wet ground.

It was very hot in the forest. But the weather changed. It became cold. Many trees could not live in cold weather. The trees died and fell. Open fields took the place of forests. The sun made ground dry and hard.

Horses began to change, too. They began to get bigger. This took a long time. On the dry, hard land, horses needed only their middle toes for running. Their middle toes became hard. After a long while, horses had only one hard toe on each foot. We call this hard toe a hoof.

（1）、Long ago, the horse had toes on each of its front feet.

A、four B、three C、one D、two

（2）、Which of the following does this story lead you to believe?

A、Animals have always been the same as they are today. B、When the earth changed, animals began to change, too. C、Weather stays the same all year long around the world. D、When the earth changed, animals didn't change.

（3）、What did the horses need on dry, hard land?

A、On the dry, hard land, horses needed only their middle toes for running. B、On the dry, hard land, horses needed a lot of hoofs for running. C、On the dry, hard land, horses needed to get smaller. D、On the dry, hard land, horses needed nothing.

（4）、The main idea of the whole story is about .

A、the weather never changes B、cats were once much bigger than horses C、horses changed very much over the years D、horses have no toes today

举一反三

    Taking away a city's rubbish is a big job. Every day trucks come into a city to collect it. Most rubbish is made up of things we can't eat or use. If we kept these things, we would soon have a mountain of rubbish.
    In some cities the rubbish is collected and taken outside of city to a dump. Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewage system takes away the used wate r from toilets, bathtubs and other places.
    To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally , a house or a school may be built there, and then you'd never know that this had once been an old rubbish dump.
    In other cities the rubbish is burnt in special places. The fire burns everything but the metal. Sometimes the metal can be used again in factories where things are made of metal. The food parts of rubbish are put in special piles where they slowly change into something called humus, which looks like black earth. It is rich with kinds of things that feed plants and help make them grow.

    A 15-year-old student who invented a flashlight(手电筒) getting power from the holder's body heat is going home today from California with a big prize and a chance to do further research.
    Ann Makosinski was the only Canadian among the four winners at Google's international science competition. Thousands of young scientists from around the world took part in the competition.
    Winning the science and technology competition was "a surprise". Ann said, "I think it will have a great influence on my future."
Ann thanked her family for encouraging her interest in science and said that her first toy was a box of transistors(晶体管).
Ann's prize includes $ 25,000 and a "once in a-lifetime expericnce" from Google for her Hollow Flashlight, which has no moving parts or batteries.
    The idea for the invention came from seeing unwanted batteries and her friend's experience. When Ann visited a friend in the Philippines, she saw the friend couldn't study when it became dark because there was no electricity or light. She saw the need for a flashlight that has no batteries - Hollow Flashlight.
    In her project, Ann wrote "I made two flashlights that do not use any batteries or harmful materials. They do not create any noise and will always work. The flashlight needs at least a 5℃ temperature difference between the holder's body and the environment around to produce light."
    A video of Ann explaining how she creatcd the flashlight has been watched more than 1.4 million times on the Internet.
Though Ann was successful, she has not made a decision about her career path. Ann hopes that she can find a way to join her love of film and science together.
    The four winners were chosen from 15 final competitors from eight countries. The competition attracted thousands of students in 120 countries.

阅读理解A

Waste can be seen everywhere in the school. Some students ask for more food than they can finish and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don't agree with them.

Waste can bring a lot of problems. Although China is rich in some resources, we are short of others, such as fresh water. It is reported that we will have no coal or oil to use in 100 years. Think about it. I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.

In our everyday life, we can do many things to prevent waste from happening. For example, turn off the water taps when we finish washing, turn off the lights when we leave the classroom and try not to order more food than we need. Little by little, everything will be changed. Waste can be stopped one day if we do our best to form the habit of saving.

阅读理解

Sharks(鲨鱼) are the most frightening animals in the sea. Sometimes we can see sharks swimming in the sea around Hong Kong. People put nets around some beaches to protect swimmers. When there is a "shark's flag", people must stay on the beach. It will be too late if a shark can swim sixty kilometres an hour to you.

There are 30 kinds of sharks and 25 kinds of them are dangerous. The whale sharks are, very big. They can grow to 18 metres long, but they are not dangerous to people. The jaws(大白鲨) and the tiger sharks are the most dangerous kinds of sharks.

Do you know all sharks must keep swimming, or they will go down?

All sharks can feel everything that happens around them. We must keep calm and don't make any noise when a shark is swimming near you.

If a shark loses a tooth, a new one will grow out very quickly. So sharks always have many sharp teeth.

阅读下面材料，然后从各题所给的四个选项中选出一个最佳答案。

	The kangaroo can't walk, but it is good at jumping, It can jump over 6 meters a time, 64km an hour. An adult kangaroo is only 1. 5m tall, but it can jump over a car.
	The camel can live without (没有) water for two weeks. It can walk over 320 km in the desert (沙漠) without drinking water. It can do this because it uses the hump (驼峰) to save water.
	The chimpanzee is very smart. It is good at learning. In America, there is a chimpanzee called Keke. It learns sign language (手语) and can "talk"with people.

阅读理解

Many environmental groups are warning that oceans of the world are in great danger. In the past 50 years, the number of water with zero oxygen(氧气) in the open ocean has increased more than four times. In the near coast water bodies, including the river mouth and seas, low-oxygen areas have increased more than 10 times since 1950.Scientists discover that oxygen continues dropping ever outside these zones as the Earth warms. To stop the drop, the world needs to control in both climate change and nutrient(养分) pollution.

Oxygen is a must to life in the oceans. The drop in ocean oxygen is among the most serious effects of human activities on the Earth's environment.

This is the first time for the scientists to take such a deep look at the causes, results and solutions to low oxygen worldwide, in both the open ocean and the near coast waters. About half of the oxygen on Earth comes from the ocean. However, mixed effects of nutrient loading and climate change are greatly increasing the number and size of "dead zones" in the open ocean and the near coast waters, where oxygen is too low to support most sea life.

In the areas traditionally called "dead zones", like those in Chesapeake Bay and the Gulf of Mexico, oxygen drops to levels so low that many animals have trouble in breathing and die. As fishes run away from these zones, their living areas become smaller and smaller. But the problem goes far beyond "dead zones". Even smaller oxygen drops can hold up the growth in animals and lead to disease or even death. Low oxygen also can cause the release of dangerous chemicals. Although a few animals can grow well in dead zones, overall biodiversity(多样性)falls.

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