Children above 12 are able to take part in skiing or other activities _______for them.
#92837
A
designed
B
designing
C
to design
D
having designed
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________ many times, he finally understood it.
#94974
A
Told
B
Telling
C
Having told
D
Been told
Do you know we have much difficulty ____ the work on time.. 
#97766
A
on finishing
B
finishing
C
to finish
D
at finishing