A healthy life is frequently thought to be with the open countryside and home-grown food.

问题补充：

A healthy life is frequently thought to be with the open countryside and home-grown food.

A. tied

B. associated

C. involved

D. related

答案：

A. tied

(答案→)B. associated

C. involved

D. related

解析：tie…to依赖；involve with涉及；relate with关联；…associate sth.with 把(某事物与其他事物)联系在一起。句意：人们总是把健康的生活与开阔的乡村和自家种的食物联系在一起。故选B。