Question

【题目】Be sure to remember that the choices you make are the keys ________ a healthy life.

A.to maintainB.to be maintainingC.to being maintainedD.to maintaining

Answer 1

【答案】D

【解析】

考查非谓语动词。句意：一定要记住，你所做的选择是保持健康生活的关键。The key to中的to是介词，后面接动名词作宾语，且此处表示主动，故D项正确。