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 C选项：sustenance的意思为“食物，营养”。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。其他三项意思分别是：education教育，培养； competition比赛；agriculture农业。
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