Water is all around us．Water is in the ocean．Water is in the lakes and rivers．Water is in the air．There is more water than land on the earth．All living things must have it．We must have it, too．We cannot live without drinking water．Sometimes, we do not have all the water that we need．The land will dry up without water．Sometimes, there can be too much water in the land．If it rains very, very hard, the rain water will run down the hill．It takes some of the land with it when it runs down the hills．It is called erosion when the water takes the land away．

“Erosion”in the passage means ________．

1. A.
   地震
2. B.
   雪崩
3. C.
   侵蝕
4. D.
   霜凍

Water is all around us．Water is in the ocean．Water is in the lakes and rivers．Water is in the air．There is more water than land on the earth．All things must have water to live．The plants must have it．The animals must have it．We must have it，too．We cannot live without drinking water．Sometimes，we do not have all the water that we need．The land will dry up without water．Sometimes，there can be too much water in the land．If it rains very，very hard，the rain water will run down the hills．It takes some of the land with it when it runs down the hills．It is called erosion when the water takes the land away．

Water on the earth will never be used up．It goes from the ocean to the air to make clouds．Then，it falls from the clouds down to the land．It runs off the land and out to the ocean again．The clouds make rain．The rain falls onto the land．Some of it goes into the ground．Some of it washes down and goes back into the ocean．Some water that falls down from the clouds is not rain．Some of it washes down and goes back into the ocean．Some water that falls down from the clouds is not rain．Some of this water is snow．The snow is made of water．Some water that is not rain or snow falls down from the clouds．Some of this water is sleet（雨夾雪）．The sleet is made of little pieces of ice．Some water that is not rain or snow or sleet falls down from the clouds．Some of this water is hail（冰雹）．The hail is made of ice balls!

1．According to the passage，we know that _________．

A．We can live without water                           B．the animals don't need water

C．Human beings can't live without water          D．only plants must have water

2．Which of the following is not made of water?

A．Snow                  B．sleet                    C．hail                      D．land

3．Erosion in the passage means _________．

A．地震            B．雪崩                           C．侵蝕                   D．霜凍

4．Which of the following shows the water cycle （循環(huán)）?

A．Water from the ocean→air→clouds→ rain→land→ocean

B．Water in the air→clouds→rain→land→hail

C．Water in the clouds→snow→land→ocean

D．Rain→land→river→ocean→storm

Water is all around us．Water is in the ocean．Water is in the lakes and rivers．Water is in the air．There is more water than land on the earth．All things must have water to live．The plants must have it．The animals must have it．We must have it．too．We cannot live without drinking water．Sometimes we don’t have all the water that we need．The land will dry up without water. Sometimes, there can be too much water in the land．If it rains very, very hard．the rain water will run down the hills．It takes some of the land with it when it runs down the hills．It is called erosion when the water takes the land away．

    Water on the earth will never be used up．It goes from the ocean to the air to make clouds. Then, it falls from the clouds down to the land．It runs off the land and out to the ocean again．The clouds in the air are made of water．Sometimes the water falls down from the clouds．It makes rain．The rain falls onto the land．Some of it goes into the ground．Some of it washes down and goes back into the ocean．Some water that falls down from the clouds is not rain．Some of this water is snow．The snow is made of water．Some water that is not rain or snow falls down from the clouds．Some of this water is sleet(雨夾雪)．The sleet is made of little pieces of ice．Some water that is not rain or snow or sleet falls down from the clouds．Some of this water is hail(冰雹)．The hail is made of ice balls !

1．According to the passage，we know that       ．

  A．we can live without water                   B．the animals don’t need water

  C．human beings can’t live without water       D．only plants must have water

2．There is        on the earth according to the passage．

  A．more plants than animals                    B．more water than land

  C．more rain than snow                         D．more air than water

3．Which of the following is not made of water'?

  A．Snow．           B．Sleet．          C．Hail．          D．Land．

4．Erosion in the passage means        ．

  A．地震                B．雪崩              C．侵蝕            D．霜凍

5．Which of the following shows the water cycle(循環(huán))?

  A．water from the ocean→air→clouds→rain→land→ocean

  B．water in the air→clouds→rain→land→hail

  C．water in the clouds→snow→land→ocean

  D．rain→land→river→ocean→storm

　　Water on the earth will never be used up. It goes from the ocean to the air to make clouds. Then, it falls from the clouds down to the land. It runs off the land and out to the ocean again. Tile clouds in the air are made up of water. Sometimes the water falls down from the clouds. It makes rain. The rain falls onto the land. Some of it goes into the ground. Some of it washes down and goes back into the ocean. Some water that is not rain or snow falls down from the clouds. Some of this water is sleet（雨夾雪）. The sleet is made of little pieces of ice. Some water that is not rain or snow or sleet falls down from the clouds. Some of this water is hail（冰雹）. The hail is made of ice halls!

A．we can live without water

B．the animals don't need water

C．human beings can't live without water

D．only plants must have water

A．more plants than animals

B．more water than land

C．more rain than snow

D．more air than water

(5) Which of the following shows the water cycle（循環(huán)）?

A．water from the ocean→air→clouds→rain→land→ocean

B．water in the air→clouds→rain→land→hail

C．water in the clouds→snow→land→ocean

D．rain→land→river→ocean→storm

The ocean can be a great place to swim and play, it may also be useful in another way. Some scientists think that waves could help make electricity.
“Have you ever been on a surfboard or boat and felt yourself being lifted up by a wave?” asked Jamie Taylor of the Wave Energy Group in Scotland. “There is certainly a lot of energy in waves.”
Scientists are working on using that energy to make electricity. The United States and a few other countries have started doing research on wave energy, and it is already being used in Scotland.
Most waves are created when winds blow across the ocean. “The winds start out by making little ripples (波紋) in the water, but if they keep on blowing, those ripples get bigger and bigger and turn into waves,” Taylor said. “Waves are one of nature’s ways of picking up energy and then sending it off on a journey.”
When waves come towards the coast, people can set up dams(大壩) to block the water and send it through a large wheel called a turbine(渦輪). The turbine can then power an electrical generator(發(fā)電機).
We will never run out of wave power. Besides, wave energy does not create the same pollution as oil and coal do.
Oceans cover three quarters of the earth’s surface. That would make wave power seem perfect for creating energy around the world. But there are some disadvantages that need us to pay more attention to.
Jamie Taylor said that wave power still cost too much money. He said that its influence on animals in the sea is still unknown. Besides, wave power would get in the way of fishing and boat traffic.
With more research, “Many of these problems might be solved,” Taylor said. “Finding more energy sources(資源) is very important, for traditional sources of energy like oil and gas may run out some day.”
In the future, when you turn on a light button, an ocean wave could be providing the electricity!

【小題1】We can learn from the passage that__________________.