阅读理解：

阅读下列短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。

　　Nearly all energy comes from the sun, either in a roundabout (迂回的) way or straight from it, in the form of heat and light. The light from the moon, too, comes from the sun. The moon can be said to be like a large mirror which throws back the sun's light to the earth.

　　Electrical energy comes from the sun in a roundabout way. It can come from the power of water falling down mountains. The water falls there as rain, and we know that rain is made by the sun's heat evaporating (使蒸发) the water on the earth's surface. This water vapor (蒸气) rises, condenses (凝结) on cooling, and falls as rain.

　　The light and heat energy from coal also comes from the sun in a roundabout way. Coal was made by the rocks pressing on trees and plants which died millions of years ago. Those trees and plants grew with the aid of sunlight, from which they made carbohydrates (碳水化合物), in this way changing the sun's energy into chemical energy. When we burn coal, some of this energy is set free.

　　Energy which we use to drive car engines comes from petrol, which also was made with the aid of the sun in a roundabout way. Plants, and animals which ate the plants, died millions of years ago, and the parts of them that were left were pressed under the rocks in the earth. These parts left from dead animals made petroleum, from which petrol and oil are now produced.

　　Thus we can say that the sun is the place where nearly all energy comes from, and that without the sun's heat and light, there could be no life on earth.

1．The power of water falling down mountains comes from the sun because ________.

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A．the sun heats the water in the mountains

B．the water comes from the rain which is heated by the sun

C．the water comes from vapor, which is made by the sun's heat

D．the water is heated by the sun

2．When coal is burnt, some of the chemical energy is ________.

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3．Which of the following is NOT true?

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A．Petrol can be used as energy to drive car engines.

B．Coal was formed by trees and plants which died millions of years ago.

C．Plants and animals which died millions of years ago formed oil.

D．The sun's heat and light caused dead animals and plants to become oil.

4．The main purpose of the passage is to tell us that ________.

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A．the sun can be said to be the source (来源) of nearly all energy

B．rain is made by the sun's heat evaporating the water on the earth's surface

C．many forms of energy are received indirectly from the sun

D．human beings cannot live without the sun