2. 考研
  3. ATo be good foragricultural purposes, soil Bmust have Cin it the minerals plants Drequired.

ATo be good foragricultural purposes, soil Bmust have Cin it the minerals plants Drequired.

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问题 ATo be good foragricultural purposes, soil Bmust have Cin it the minerals plants Drequired.
选项
答案D
解析 required改为require。这里plants是require的逻辑主语，故为主动语态。
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考研英语一

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