完形填空

　　The other day, my classmates and I talked about the rules we have in school. We have some rules that we disagree. The first one is about the uniforms. We don't feel 1 or fashioned. We are not allowed to wear our own clothes so we have to wear uniforms. Actually, we want to design by ourselves. Secondly, we are not allowed to 2 in groups. Parents say we get 3 but we learn a lot from each other.

　　The last 4 is that we want vacations to be 5 . During the longer vacation, we can have opportunities to be volunteers which must give us good experiences.

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　　Cars are g ________ out carbon monoxide（一氧化碳CO).Some people b ________ CO is causing global warming. So try to walk, bicycle, or use public t ________.

　　Showers use a lot of water. Buy a special “low-flow” showerhead or take s ________ showers. It can cut the use of water in half.

　　We use a lot of e ________ to heat and cool homes. So turn the heat down at night. Replace regular（平常的）light bulb. Use fluorescent（荧光的）because it uses less energy.

　　Don't use disposable（可任意使用的）products. If you use disposable products, you should use products made from recycled m ________. Also, recycle all the time.

阅读理解

　　When the weather is hot, you go to a lake or an ocean. When you are near a lake or an ocean, you feel cool. Why？ The sun makes the earth hot, but it can not make the water hot. Though the air over the earth becomes hot, the air over the water stays cool. The hot air over the earth goes up, then the cool air over the water moves in and takes the place of the hot air. When you are near a lake or an ocean, you feel the cool air when it moves in. You feel the wind and the wind makes you cool.

　　Of course, scientists cannot answer all of our questions. If we ask “Why is the ocean full of salt？” scientists will say that the salt comes from rocks. When a rock gets very hot or very cool, it cracks (崩裂) , and rain falls into the cracks. The rain then carries the salt into the earth and the rivers. The rivers carry the salt into the ocean. But then we ask “What happens to the salt in the ocean？ The ocean does not get saltier every year. “ scientists are not sure about the answer to the question.

　　We know a lot about our world. But there are still many answers that we do not have, and we are curious(好奇的).

阅读短文，判断正(T)误(F)。

1．Scientists can answer all questions.

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2．Now scientists know what makes people feel cool near a lake or an ocean. in summer.

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3．Scientists say that the salt in the ocean comes from rivers and lakes.

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4．A rock cracks when rain falls.

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5．People are always curious because there are many new things for them to know.

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