The passage indicates that ancient treatments for injury and disease were______. It can be seen from the passage that the earth

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问题 The passage indicates that ancient treatments for injury and disease were______.
It can be seen from the passage that the earth’s supply of natural medicines______.

选项 A、may never be exhausted
B、is surprisingly big
C、may be dropping rapidly
D、is as rich as ever

答案C

解析 借助常识判断C是答案。如果借助原文:利用题干中的核心结构“the earth’s supply of natural medicines”作为答案线索同,这样找到直接答案相关句:This is because the earth’s supply of natural medicines may be dropping rapidly.该句说“地球上草药的供应可能会迅速减少”,因此C是答案。
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