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【题目】According to the research, it takes 21 days to _______ a new good habit.

A.cultivateB.exchangeC.handleD.inform

【答案】A

【解析】

考查动词。句意:根据研究,培养一个新的好习惯需要21天。A. cultivate培养;B. exchange交换;C. handle处理;D. inform通告,告知。根据a new good habit可知,一个新的好习惯不能说“交换、处理、告知”,应该说“培养”一个好习惯。故选A

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