单选题：How does the author feel about the prospect of protecting e

题目内容：

How does the author feel about the prospect of protecting endangered species from being extinct? A．Worried.
B．Optimistic.
C．Indifferent.
D．Confident.

参考答案：

答案解析：

According to the passage, which of the following is most im

According to the passage, which of the following is most important in saving de

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