Scientists are working hard to come up with a sure solution to the food______ for mankind.

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问题 Scientists are working hard to come up with a sure solution to the food______ for mankind.

选项 A、decline
B、rarity
C、scarcity
D、shortage

答案D

解析 shortage n.不足,缺少。decline n.下降,减少,衰落。rarity n.稀少,少见的人或东西(常与不定冠词连用)。scarcity n.缺乏,稀少。
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