摘要：1229] One quarter of the area by green trees. [译文] 四分之一的地方被绿树覆盖着. A. are covered B. is covered C. covers D. covering [答案及简析] B. 句中缺谓语动词,分数 + of the作主语.谓语的单复数问题由of后面的名词决定.是复数就用复数.是单数就用单数.

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