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阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳答案。

　　1．Where are the rainforests?

　　Rainforests cover six per cent of the Earth's surface．There are rainforests in many parts of the world but the biggest forests are in South America, Africa and South East Asia．There aren't any rainforests in Europe or North America．

　　2．What's in the rainforests?

　　About 75％ of all the types of animals that we know come from rainforests．Thousands and thousands of animals live in rainforests．There are many very beautiful birds, insects and reptiles．Many of them live in the trees, more than 30 metres from the ground．There are also thousands of different plants－and lots of tall trees! It is always hot in a rainforest and

　　the ground is always wet．It is also dark．

　　3．Why are the rainforests important?

　　The rainforests are very important for us．We need them! The trees and other plants in the forest help to make the air that we breathe．They give us wood, rubber, fruits and many of our medicines．

　　4．________________

　　Unfortunately, in many places, the rainforests are in danger．For example, many years ago there was a large rainforest in Java．There were thousands of different plants and animals in the forest, but now there is nothing．People chopped down the trees because they wanted to grow rice．Many animals lived in the rainforest．Some of them went to other parts of Java but many of them disappeared－forever．The same thing is happening now in many other parts of the world．The rainforests are in danger．

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