【題目】Fruit and vegetables _______healthy food.

A. is both B. both is C. are both D. both are

【答案】C

【解析】句意：水果和蔬菜都是健康的食物。主語Fruit and vegetables是復數(shù)，故謂語用復數(shù)形式，both謂語系動詞之后，實義動詞之前，故此處為are both，故選C。

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