问题
选择题
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
答案
答案：A
搜题请搜索小程序“爱下问搜题”
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
答案：A