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

问题补充：

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

A. take up

B. make up

C. carry out

D. hold out

答案：

(答案→)A. take up

B. make up

C. carry out

D. hold out

解析：

试题分析:考查动词短语辨析。A从事，开始做；B化妆，弥补；C执行，开展；D坚持，维持。从语境判断老年人们是开始慢跑，其他不符合句意，所以答案选A。句意：为了保持健康，大多数退休的老年人都开始把慢跑当作一种经常的锻炼方式。