英文關鍵字
attentively
boy
caucasian
cheerful
child
childhood
concentrating
concept
dance
desk
drawing
education
exercises
front
funny
hands
happy
homeschooling
homework
indoors
joyful
kid
knowledge
learning
length
looking
man
math
mathematics
notebook
papers
pen
pencil
pupil
school
schoolwork
serious
sitting
smiling
student
study
studying
table
teaching
teen
uniform
view
working
writing
young