2. 外语
  3. Over-cultivation and a long period of soil erosion has reduced the______of much of the country’s farmland.

Over-cultivation and a long period of soil erosion has reduced the______of much of the country’s farmland.

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问题 Over-cultivation and a long period of soil erosion has reduced the______of much of the country’s farmland.
选项 A、sufficiency
B、fertility
C、prosperity
D、mobility
答案B
解析 上下文语义。根据语境，空格应填入与soil同类的词。选项中，只有fertility(肥沃；生产力)符合题意。故答案为B。sufficiency“充足，充裕”；prosperity“繁荣”；mobility“变动性；情感不定”。
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