阅读并判断，用T或F表示。
This is the Earth. The green part is land. The blue part is sea. The white part is clouds. Our Earth is very beautiful and interesting. There are rivers, seas and lakes. There are hills and mountains. There are woods, jungles and forest. There are many countries and cities. There are many people living in them.
Many years ago, the Earth was very clean. But now there is much pollution(污染) on the Earth. People are cutting down the forests. Many wild animals, birds and insects lose their homes. People are killing animals for their food and their skins. It’s very cruel. People are polluting the land, the water and the air. People must stop doing this. We must save the Earth.
( ) 1. The green part is sea on the Earth.
( ) 2. There are many countries and cities on our Earth.
( ) 3. Many years ago, there was much pollution on the Earth.
( ) 4. It’s time for us to save the Earth.
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