To lose weight, Mr White hiking as a regular form of exercise after he retired.
A. caught on
B. took up
C. set out
D. made for
网友回答
A. caught on
(答案→)B. took up
C. set out
D. made for
解析：考查词组辨析：A.caught on理解，B.took up从事，开始学习，占据，C.set out开始，着手，D.made for前往，有助于，句意：为了减肥，怀特先生退休后开始远足做为定期的锻炼形式。选B。