英文關鍵字
boy
child
childhood
class
classroom
clever
close
closeup
concentration
counting
cute
education
elementary
exam
exercises
hard
home
homework
idea
intelligent
kid
knowledge
learn
lesson
math
mathematics
preschool
primary
pupil
school
schoolboy
schoolkid
smart
smiling
solution
solve
student
study
studying
task
test
textbook
think
thinking
thoughtful
up
work
write
writing