英文關鍵字
america
blackboard
board
boy
caucasian
chalk
chalkboard
child
class
classroom
clever
digits
education
educational
exam
female
geography
girl
hand
happy
high
homework
intelligence
intelligent
job
kid
knowledge
learning
lesson
listening
looking
numbers
people
person
professor
proud
school
schoolchild
smile
student
study
studying
talking
teacher
teaching
tutor
uniform
world
young