2. 外语
  3. Communities in primitive areas where natural______is scarce must be resourceful in order to secure adequate nutrition.

Communities in primitive areas where natural______is scarce must be resourceful in order to secure adequate nutrition.

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问题 Communities in primitive areas where natural______is scarce must be resourceful in order to secure adequate nutrition.
选项 A、education
B、competition
C、sustenance
D、agriculture
答案C
解析 sustenance的意思为“食物，营养”，如：The earth brings forth large cropsevery year for the sustenance of man and beast．(大地每年生产出大量的农作物，供人畜食用。)句意：在天然食物匮乏的原始地区，各个部落的人们必须富于机智才能获取足够的营养。故选C。其他三项分别意为：education教育，培养；competition比赛；agriculture农业。
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