Cycling is a good way of exercise and is quite easy _________. 
#93435
A
to do
B
to be done
C
doing
D
being done
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Have you found the suitable music ______ at the party?
#99003
A
dance to
B
to dance with
C
dancing
D
to dance to
Now a lot of new technologies can ______  problems in industry.
#93741
A
be applied to solve
B
be applied to solving
C
apply to solve
D
apply to solving