Question

【题目】Now a large number of people start __________ the importance of a healthy lifestyle.

A. understand B. understood C. understanding D. to understand

Answer 1

【答案】D

【解析】句意：------现在很多人开始认识到健康生活方式的重要性。当start后接的动词为表示心理活动的动词如understand, realize等时,后接to do sth. 故选D。