【題目】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：我奶奶為保持思維敏捷常作字謎游戲。Keep one’s mind sharp保持思維敏捷。題干中缺少目的狀語(yǔ)，只有不定式才能做目的狀語(yǔ)。故選A。

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