完形填空。

Today we can see that many people are cutting down the trees in the forests. A lot of1 land has become deserts. If we2 newspapers, we'll learn that the forests on the earth are getting smaller 3. We are cutting down large numbers of trees4 we need wood and farmland. Some 5 say that there will not be any great forests 6 20 or 30 years.

What will happen 7 the forests disappear? A lot of plants will die and the animals will8 their homes. In many places the new farmland will soon look 9 the old deserts. Crops will not grow there. There won't be enough 10, and the weather will get hot and dry.