2. 外语
  3. Within the foreseeable future there may be a major ______ of species, involving from one-third to two-thirds of all the species

Within the foreseeable future there may be a major ______ of species, involving from one-third to two-thirds of all the species

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问题 Within the foreseeable future there may be a major ______ of species, involving from one-third to two-thirds of all the species now in existence.
选项 A、exhaustion
B、exhibition
C、extension
D、extinction
答案D
解析 在不久的将来可能会有物种的灭绝，包括现存的1/3～2/3的物种都会濒临灭绝。这道题考查学生辨别形近词的能力，这四个词长得很像，但意思却大相径庭：exhaustion耗尽，exhibition展览，extension拓展，extinction灭绝。
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