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    As we all know, the ocean moves. But waves breaking on the beach make the ocean fun. When you stand on the shore and look at the waves, it seems like the water is moving towards you. But the water is not really moving forward. The moving you see is wave energy. And wave energy comes from the wind.

    Let’s think about how this works. As wave energy passes through the water, the energy makes particles （粒子） of water move up and down. Just give you an example of a wave passing under a basketball. We put a basketball on the sea. When the wind blows, a wave comes from behind the basketball. The basketball moves up to the top with the wave. Then the wave continues and leaves the basketball behind. The basketball looks lower, but it doesn’t move forward. That’s because the wave energy just moves the water which is under the basketball.

    　  So why can you see a wave knock you down on the shore？When a wave moves toward the shore, the bottom of the wave slows down because it meets the ocean floor. But the top, which is called crest(浪峰), keeps moving. The different action causes the wave to fall over or break onto the shore. If a wave is very large, it carries a lot of energy when it hits the land. As time goes by, waves can break up and carry away the rocks and other things on the shore. Shorelines are changing all the time because of wave action.

    51. ______ is really moving forward when you look at the wave.

      A. Water      B. The basketball     C. Water and wave energy     D. Wave energy

    52. Match the sentences with the pictures and the right answer.

       (1) The basketball moves up to the top with the wave.

       (2) The basketball continues and leaves the basketball behind.

       (3) When the wind blows, a wave comes from behind the basketball.

    A. a—(2)  b—(1)  c—(3)              B. a—(3)  b—(1)  c—(2)

    C. a—(1)  b—(3)  c—(2)              D. a—(3)  b—(2)  c—(1)

    53. Which of the following is NOT true according to the passage?

      A. Wave energy comes from the water.

      B. Large waves carry plenty of energy.

      C. Wave action makes shorelines change all the time.

      D. The bottom of the wave is easy to slow down.

    54. The underlined word “it” ( Paragraph 3) refers to “________”.

    A. particles of water      B. the shore      C. the wind    D. the bottom of the wave

    55. The main idea of this passage is ______.

      A. what makes particles of water move         B. how a basketball moves on the ocean

    C. how wave energy causes wave action        D. why a wave can knock you down

    DBADC  

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    Future and Today

    　　It is well known that everyone has his own dream as well as his own future. But do you know what future really is ? I have to say that future is now. That is to say we must treasure every minute now. If we want to have a bright future, we should know how important time is and use it well.

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    　　We should always remember: future is now. For us students, we should try our best to work hard in order to create a great future of our own. We should make the best use of every hour and be the master of today. We should do everything before us as well as possible. And never put off what can be done today till tomorrow.

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    Be7.    of today

    Today’s hard work 8.   to tomorrow’s harvest. As students, we should never9.   what can be done today till tomorrow and we should try our 10.   to do everything well.

     

     

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