Question

【题目】

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

A．to keep B．kept

C．having kept D．to be kept

Answer 1

【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。