题目内容

It may be difficult to imagine by the year 2100, we will live on Mars. Our own planet, the Earth is becoming more and more _______ and polluted. Luckily, we can start again and build a better world on Mars.

First of all, transport should be much better. _______, our spaceships are too slow to carry large numbers of people to Mars - it takes months. However, by 2100, Spaceships can travel at half the speed of light. It might take us two or three days to get to Mars.

Secondly, humans need food, water and air to live. Scientists should be able to develop plants that can be grown on Mars. These plants will _______ the food and the air that we need.

There is still another _______ for us to live on Mars. Mars makes us much lighter than the Earth does. This will be dangerous because we could easily jump too high and fly slowly away into space. To _______ this, humans on Mars have to wear special shoes to make themselves lighter.

Life on mars may be better than that on the Earth in many ways. People will have more space. Living in a large building with 10 bedrooms is highly _______. Many people believe that robots will do most of our work.

However, life on Mars may not be better than that on the Earth today. Meals will probably be in the form of pills and space travel will make many people feel ill.

1.A.crowded B.modern C.developed D.serious

2.A.At times B.At last C.By the way D.At present

3.A.destroy B.produce C.grow D.support

4.A.hope B.chance C.problem D.mistake

5.A.refuse B.prevent C.realize D.repair

6.A.changeable B.responsible C.possible D.impossible

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回答问题

Today ,more and more sharks(鲨鱼)die because of humans' activities .Sharks are facing hard living conditions these days. As we know ,sharks are among the oldest animals on earth. There are over 500 kinds of sharks living in the oceans. Most of them are quite large and they are about two meters long. Yet some are small , for example, the dogfish shark is less than 20cm long . The shark has a strong sense of smell. This sense helps sharks find their food . Sharks eat fish and plants in the ocean.

Sharks grow slowly. About forty percent of all sharks lay(产) eggs. The others give birth to baby sharks. Some sharks carry their babies inside their bodies as humans do. Some sharks are not able to have babies until they are twenty years old. And each of them gives birth to at most ten baby sharks.

People kill sharks for food, medicine and their skin(皮肤). Experts say the market needs much more sharks . In Asia, people enjoy a kind of food made from shark fins(鱼翅).

For the reasons above, some sharks are endangered.

根据上面的文章用完整句子回答下面5个问题。

1.How is sharks' living conditions these days?

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2.What’s the number of the kinds of sharks living in the oceans?

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3.What do sharks eat in the ocean?

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4.What’s the length (长度)of the dogfish shark?

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5.Where do people enjoy a kind of food made from shark fins?

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