2. 外语
  3. Many species of animals which once lived on the earth are no longer in ______.

Many species of animals which once lived on the earth are no longer in ______.

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问题 Many species of animals which once lived on the earth are no longer in ______.
选项 A、existence
B、survival
C、life
D、reality
答案A
解析 existence n．存在(be in existence存在；come into existence开始存在：go out of existence不复存在)。survival n．幸存，继续生存；幸存者，残存物。in reality实际上。
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