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
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