根据短文内容,用方框中所给单词的适当形式填空,每词限用一次,其中有两个为多余选项。请将答案写在题后横线上。

  Rainforests cover six percent of the earth’s surface.There are rainforests in many   1   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.

  About 75%of all the types of animals   2   from rainforests.Thousands and thousands of animals live in rainforests.There are many beautiful birds, insects and reptiles.Many of them live in the trees, over 30 meters from the   3  .There are also thousands of different plants-and lots of them are tall trees!It is always hot in a rainforest and the ground is always wet.It is   4   very dark there.

  The rainforests are very important for us.We   5   them!The trees and other plants in the forest help to make the air that we breathe.They also help to control the   6  .They give us wood, rubber, fruits and many of our medicines.

  Unfortunately, in many places, the rainforests are in danger.For example, many   7   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 cut down the trees   8   they wanted to grow rice.They also wanted to grow rubber trees   9   rubber.Many animals lived in the rainforest.Some of them went to other parts of Java, but many of them disappeared-forever.The same thing   10   now in many other parts of the world.The rainforests are in danger!

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