题目内容：

    Scientists are trying to find new clean energies, so that they do not pollute the environment. Solar power(太阳能)is one of them.

Solar power is a kind of electricity.It takes energy from the sun by using solar panels(太阳能金属板).People usually put the solar panels on the roofs of the houses and buildings.It is the family solar power system. Some countries are even beginning to build solar power factories by setting thousands of solar panels in some place, because there is enough sunshine. Solar power panels have many advantages. The power is easy to get and will never be used up. Whenever it is sunny, there is power. The power is clean and renewable. It helps to reduce waste and pollution.It is also great for the environment. In some places,because they are too far away to send electricity or not easy to build electric power factories, solar power is especially necessary.

More and more countries,such as China, the USA,Japan and India, encourage scientists to develop technology to put solar power into use. However, the power is not as widely used as expected（预期的）.

One of the difficulties is that a solar power system needs sunshine. Some countries having lots of rain, like the UK, are not suitable to develop such power systems. Secondly,a solar power factory requires a very large place to set enough solar panels to collect sunlight and change it into electricity. Maybe an area in the desert would be one of the perfect places for such a factory to build. What’s more, solar panels are expensive at present though the energy itself doesn’t cost anything.

Today scientists are working hard to develop cheaper solar power systems. Maybe one day solar power will be one of the most important clean energies in our life.

根据短文内容，选择正确答案。

1.Solar power is a kind of energy taken from        .

A.the air B.the sun C.the water D.the ground

2.Where is this passage probably from?

A.A poster B.A magazine C.A letter D.A  cookbook

3.What is the fourth paragraph of the passage mainly about?

A.The ways to use solar power

B.The advantages of solar power

C.The places to build the solar power plants

D.The difficulties of putting solar power into use widely

4.Which of the following sentences is NOT right?

A.Solar power is a kind of electricity

B.The solar power is suitable for every country

C.Solar panels are expensive at present

D.Scientists are working hard to develop the solar power systems

5.What can we learn from the passage?

A.Solar energy itself is expensive

B.Solar power will be used up very soon

C.Solar power is a kind of clean and useful energy

D.Solar power is much better than the other energies