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1、 阅读短文，从方框中选择适当的词并用其正确形式填空，使短文通顺、意思完整。每空限填一词，每词限用一次。
earth, ocean, forest, natural, provide, save, protect, pollute, danger, besides, important, coal, example, breathe
The is our only home. About 71% of it is covered by , and the rest is land with and mountains. It gives us plenty of resources like water, and oil.
Forests are very because they fresh air for us to . However, some people cut down too many trees, and is becoming worse. As a result, many wild animals are in .
We must take action to the Earth. planting more trees, we can energy by using public transport. For, we can take buses or subways instead of driving cars. Everyone should play a part in our beautiful home.
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2、 保护地球对我们每个人来说都是一项重要的任务。
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3、 许多野生动物因为失去家园而处于危险之中。
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4、 空气污染使许多人患上呼吸疾病。
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5、 我们应该节约能源，比如离开房间时关灯。
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6、 森林不仅为我们提供新鲜空气，还为动物提供栖息地。
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7、 海洋覆盖了地球表面的大约百分之七十一。
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8、 Beside, we can recycle glass bottles to reduce waste.
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9、 Many animals are in dangerous because of pollution.
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10、 The ocean cover more than half of the Earth's surface.
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11、 We should learn protect the environment every day.
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12、 There are lot of natural resources on the Earth.
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13、 Have you ever joined an Earth protection activity?（作否定回答）
, .
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14、 People cut down too many trees last year.（改为被动语态）
Too many trees down by people last year.
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15、 We can save energy by turning off unused lights.（对划线部分提问）
we save energy?
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16、 People started to protect the Earth many years ago.（用since many years ago改写句子）
People the Earth since many years ago.
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17、 Forests provide fresh air for us.（改为同义句）
Forests fresh air us.
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18、 按要求完成句子
provide / protect / save / important / natural / dangerous
(1)、Trees us with shade and fruit in summer.(2)、It's to teach kids about Earth protection from a young age.(3)、We should water by taking shorter showers.(4)、We must the wild animals from being hurt.(5)、 disasters like earthquakes are hard to predict.(6)、We need to respect and not destroy it. -
19、 用所给短语的适当形式填空
natural resources, cover the Earth's surface, provide fresh air, save energy, protect forests, air pollution, in danger, besides, for example, give a report on the Earth
(1)、About 71% of the Earth is water that .(2)、Forests and many kinds of food for humans.(3)、We can by turning off lights when leaving a room.(4)、The Earth gives us many like coal and oil.(5)、We must because they are important to our environment.(6)、 is getting worse with more cars on the road.(7)、Many wild animals are because of overhunting and pollution.(8)、 planting trees, we can also reuse plastic bags.(9)、We can do small things to protect the Earth, , we can collect waste paper.(10)、Our teacher will in class tomorrow. -
20、 重点短语(1)、自然资源(2)、覆盖地球表面(3)、提供新鲜空气(4)、节约能源(5)、保护森林(6)、空气污染(7)、处于危险中(8)、除此之外；而且(9)、例如(10)、做关于地球的报告