Question

Our earth has a long history of about 4,600 million years. Man only lived on the earth for 3,500 years. But we' ve already changed our earth a lot. Some of the changes are good while some are ①_for the earth.

In the past hundreds of years, people have cut down too many trees. So more beautiful animals and plants②____out. Cars and buses have polluted the air. Factories have also polluted the land and the water.

Many forests and farms became deserts（沙漠）.The earth gets warmer and warmer. Because the surface of ocean（海平面）is rising, in the future some big cities will fall into the sea water. How terrible it is! The problems are more and more serious. So we must do something to stop people from polluting our earth.

任務(wù)一：請根據(jù)短文內(nèi)容，分別寫出①、②兩處所缺單詞。

1.① ②

任務(wù)二：根據(jù)意思，用短文中恰當?shù)膯卧~補全句子。

2. (l)It's known that China is a great country with a long____ ．

(2) Could you be more____ this time? The competition is important to us.

任務(wù)三：請把上文中畫線的句子翻譯成漢語。

3.____

任務(wù)四：請根據(jù)短文內(nèi)容回答下列問題。

4. What does the underlined word "rising" mean in Chinese?

5.What polluted the air?

Answer 1