His ______ brain has worked away on the idea of a universal cure.A.richB.quickC.productive
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His ______ brain has worked away on the idea of a universal cure.
A.rich
B.quick
C.productive
D.fertile
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正确答案:D
解析:Fertile“点子多的,想象力丰富的”,fertile brain“丰富的头脑”,符合句意;productive“生产能力强的,多产的”;rich“富有的,丰富的”,通常指物产和资源,不修饰人的大脑和思维;quick“迅速的,敏捷的”。
