The (three-fields) system is an agricultural method in which one field (out of) (three) is (left) to lie fallow while the other

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问题 The (three-fields) system is an agricultural method in which one field (out of) (three) is (left) to lie fallow while the other two fields are being cultivated.

选项 A、three-fields
B、out of
C、three
D、left

答案A

解析 单复数错误,应改为three-field。“数词+名词:”构成的合成形容词中,名词要用单数。如:an 80-year-old man。
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