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
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To prevent the air ___ ,something will have to ___.
#83446
A
to pollute…take
B
from being polluted ..be done
C
to be polluted…be taken
D
from polluted… be done
I was deeply impressed with the man’s willingness ______.
#78133
A
by chance
B
to take chance
C
to take chances
D
taking chances