the African savannas. In these open spaces are numerous plants in various stages of growth that attract a
variety of other planteaters.
Take the rainforests for example. In their natural
state, the spreading branches overhead shut out sunlight
and prevent the growth of plants on the forest floor. By
pulling down trees and eating plants, elephants make
open spaces, allowing new plants to grow on the forest
floor. In such situations,the forests become suitable for
large hoofed planteaters to move around and for small
planteaters to get their food as well.
What worries scientists now is that the African
elephant has become an endangered species. If the
elephant disappears, scientists say, many other animals
will also disappear from vast areas of forest and savanna,
greatly changing and worsening the whole ecosystem.
36.What is the passage mainly about?
A.Disappearance of African elephants.
B.Forests and savannas as
habitats for African
elephants.
C.The effect of African elephants' search for food.
D.The eating habit of African elephants.
答案:C 主旨大意题。往往文章的第一段和最后一段都是透露文章主旨的地方。而本文正是这样。这篇文章是关于非洲象寻找食物所带来的影响的,故选C项。
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