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.

　　68. 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.

　　69. What does the underlined phrase “setting the terms” most probably mean?

　　A. Fixing the time.

　　B. Worsening the state.

　　C. Improving the quality.

　　D. Deciding the conditions.

　　70. What do we know about the open spaces in the passage?

　　A. They result from the destruction of rain forests.

　　B. They provide food mainly for African elephants.

　　C. They are home to many endangered animals.

　　D. They are attractive to plant-eating animals of different kinds.

　　参考答案

　　56—59 CDAB

　　60-63 ABDC

　　64—67 DDBC

　　68-70 BCD

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