To keep healthy, Professor Johnson ______ cycling as a regular form of exercise after he retired.
#71817
A
took up
B
caught on
C
carried out
D
made for
推荐题目
____________ poverty, wars _____________ thousands of lives in Africa so far.
#71495
A
At top of/killed
B
On top of/claimed
C
Apart from/ have claimed
D
Except for/have killed
 I can’t bear ____, so I hope you can come on time.
#74709
A
to keep waiting
B
to keep to wait
C
being kept waiting
D
being kept to wait
It didn’t _____ him that she would refuse his invitation
#70683
A
happen to
B
adjust to
C
belong to
D
occur to