When it es to “empty-nest syndrome(综合症)”, parents are advised to regular contact with children through phone calls, emails, texts or video chats.
A. substitute
B. sacrifice
C. associate
D. maintain
网友回答
A. substitute
B. sacrifice
C. associate
(答案→)D. maintain
解析：说到“空巢综合症”，建议老人与子女“保持”经常的联系。substitute: 替代；sacrifice: 牺牲；associate: 联系。maintain contact with sb. 与……保持联系。故D项正确。