英文關鍵字
adult
answer
answering
asian
attention
back
boy
caucasian
child
childhood
children
class
classroom
desk
education
elementary
female
girl
group
indoors
kids
knowledge
korean
laptop
learner
learners
learning
lesson
male
man
people
person
primary
pupil
pupils
question
school
schoolboy
schoolchildren
schoolgirl
semester
sitting
student
teacher
teaching