Unit 4 The amazing planet

The Earth is an amazing planet!

Some places are very hot, like the areas near the equator. Some are freezing cold, like the North and South Poles. There are fields and mountains, rivers and seas, forests and deserts. The highest mountain on Earth is over 8,800 metres above sea level. And the deepest part of the sea is more than 10,000 metres down.

The plants on Earth are wonderful in many different ways. The tallest trees in the world can reach over 100 metres in height. The smallest plant is as small as a grain of rice.

The Earth is home to millions of animals. Some, like tigers and lions, live on land. Other animals, like birds, enjoy the wide open sky. Big blue whales call the sea home, along with many amazing fish. From bears to birds, from butterflies to seahorses, animals make our planet lovely and interesting.

And what’s more, the Earth provides us with all the things we need, such as food, water; air and energy. It is our home and the only planet we know that supports life. Let's explore, learn about and take care of our home.

神奇的星球

地球是一個神奇的星球！

有些地方非常熱,，比如赤道附近地區(qū)。有些地方非常寒冷,，比如北極和南極,。這里有田野和山脈，河流和海洋,，森林和沙漠,。地球上最高的山海拔超過8800米,。海洋的最深處有一萬多米深。

地球上的植物在許多不同方面都很奇妙,。世界上最高的樹可以達到100米以上的高度,。最小的植物就像一粒米一樣小。

地球是無數(shù)動物的家園,。有些動物,，比如老虎和獅子，生活在陸地上,。其他動物,，如鳥類，享受著廣闊的天空,。巨大的藍鯨以及許多神奇的魚以大海為家,，從熊到鳥，從蝴蝶到海馬,，各種動物使我們的星球可愛而有趣,。

更重要的是，地球為我們提供了我們需要的一切,，比如食物,、水、空氣和能源,。這是我們的家園,，也是我們所知道的唯一一個支持生命存在的星球。讓我們一起探索,、了解和照顧我們的家園,。

課文填空

Unit 4

The 1.__________(令人驚異的) planet

The Earth is an amazing planet!

Some places are very hot, like the 2.__________(地區(qū)) near the 3.__________(赤道). Some are 4.__________(嚴寒的，冰凍的) cold, like the Northand 5.__________(南) 6.__________(極).There are fields and mountains rivers and seas, forests and 7.__________(荒漠). The highest mountain on Earth is over 8,800 8.__________(米) above sea level. And the 9.__________(深的) part of the sea is more than 10,000 metres down.

The plants on Earth are wonderful in many different ways.The tallest treesin the world can reach over 100 metres in height.The smallest plant is as small as agrain of rice.The Earth is home to millions of animals.Some, like tigers and lions, live on land.Other animals, like birds, enjoy the wide open sky. Big blue 10.__________(鯨) call the sea home, along with many amazing fish. From bears to birds, from 11.__________(蝴蝶) to seahorses, animals make our planet lovely and interesting.

And what's more, the Earth 12.__________(提供) us withall the things we need, such as food, water, air and energy. It is our home and the only planet we know that 13.__________(支撐) life. Let's explore,learn about and take care of our home.

Saihanba: turning desert into forest

Saihanba is a forest park in the 1.__________(北方) of Hebei. lt is about 400 km from Beijing. For hundreds of years, the 2.__________(皇帝) went there to 3.__________(打獵). But in the 1800s, things began to change. There were forest fires and 4.__________(戰(zhàn)爭), and people cut down many trees. Saihanba slowly turned into a desert.

When the forest 5.__________(不見,，消失), there were terrible 6.__________(沙塵暴) inthe Beijing area. In the early 1960s, a group of scientists 7.__________(旅游,，前往) to Saihanba to find a solution. They found an old tree in the middle of the desert."Maybe we can still plant trees here," they thought. In1962, the first tree 8.__________(種植者) arrived in Saihanba. The cold and dry weather made their work very difficult, and strong winds 9.__________(吹，刮) away many young trees. In winter, it got as cold as -40°C. Three 10.__________(代) of forest workers 11.__________(繼續(xù)) the hard work. Thanks to them, Saihanba is green again. lt is today the worid's biggest 12.__________(人造的) forest. There are hundreds of millions of trees there. The forest helps provide the capital with clean water, and there are fewer sandstorms in the Beijing area now.