Why are you happy?
Because it's Saturday today.
Why are you opening a present?
Because it's my birthday.
Why are you studying?
Because I've got a lot of homework.
Why are you wearing a helmet?
Because I'm roller skating.
Why are you washing your hands?
Because it's time for lunch.
Why are you getting undressed?
Because it's time for bed.
Why are you wearing a funny costume?
Because I'm at a party.
Why are you getting dressed?
Because it's time for school.
Why aren't you happy?
Because I'm reading a sad story.
Why are you laughing?
Because I'm watching a funny movie.