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【题目】My granny does crossword puzzles each day ______ her mind sharp.

A.to keep B.kept

C.having kept D.to be kept

【答案】A

【解析】句意:我奶奶为保持思维敏捷常作字谜游戏。Keep one’s mind sharp保持思维敏捷。题干中缺少目的状语,只有不定式才能做目的状语。故选A。

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