To keep healthy most retired people jogging as a regular form of exercise.A. take upB. t

问题补充：

To keep healthy, most retired people jogging as a regular form of exercise.

A. take up

B. take on

C. give up

D. hold out

答案：

(答案→)A. take up

B. take on

C. give up

D. hold out

解析：短语辨析，四个选项分别表示开始从事、承担穿上、放弃和坚持主张。根据题意，为了保持健康，许多退休的人开始从事慢跑作为一个普通的运动形式。选A。