We recently did a simple experiment, which happens to ________ how children's knowledge of what a hero is like determines their behaviour.
#11108
A
congratulate
B
acknowledge
C
distinguish
D
illustrate
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Rather than _______ in the crowded bus, they preferred _____ home 
#12830
A
to ride , walk
B
riding , walking
C
ride , walk
D
ride, to walk