2. 外语
  3. Agriculture is the country’s chief source of wealth, wheat _____ by far the biggestcereal crop.

Agriculture is the country’s chief source of wealth, wheat _____ by far the biggestcereal crop.

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问题 Agriculture is the country’s chief source of wealth, wheat _____ by far the biggestcereal crop.
选项 A、is
B、been
C、be
D、being
答案D
解析 本题考查语法规则。wheat being by far the biggest cereal crop为独立主格结构。若用is，句子就会出现双主语，产生句子堆砌问题。本题译文：农业是该国的主要财富来源，小麦是其最主要的粮食作物。
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