His ______ brain has worked away on the idea of a universal cure.[2006]A、richB、

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问题 His ______ brain has worked away on the idea of a universal cure.[2006]

选项 A、rich
B、quick
C、productive
D、fertile

答案 D

解析 形容词词义辨析题。rich不能跟brain搭配;quick brain的意思是“头脑敏捷,机智灵活”;productive是指“多产的,富饶的”;fertile用来修饰人的头脑时,指“主意多的,有创造力的”。因此D是最佳选项。
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