Question

To keep healthy, Professor Johnson ______ cycling as a regular form of exercise

To keep healthy, Professor Johnson ______ cycling as a regular form of exercise after he retired.
A. took up
B. caught on
C. carried out
D. made for

Answer 1

答案A
句意为：为了保持健康，Professor Johnson 退休后开始骑自行车来作为一种定期的锻炼形式。take up 开始工作，从事某项活动，所以选A 。