Situation : Pranee and Manee are talking about Halloween.
Pranee : In the U.S., what do children usually do on Halloween?
Manee : Well, they usually wear Halloween clothes, like ghosts, skeletons,
witches, and devils. Then, they _______20______ . When
homeowners answer, they always say ‘trick or treat.’
Pranee : Why do they do like that?
Manee : It’s for fun, and they want to ________21_________