英语四级快速阅读答案(第二套)
1、earth
2、 found
3、plant and  animal.
4、 Because they can help
5、Because of human
6、 the conservation of
7、increase species
8、 the likelihood of soil erosion, landslides and floods
9、 the forest is key to many of the planet’s  natural cycle
10、such as carbon and water cycles