英文關鍵字
answer
assignment
blank
boy
call
caucasian
chat
children
chromakey
class
computer
concentrate
conference
copybook
design
distance
education
green
hand
home
homework
internet
junior
kid
learn
lesson
living
notebook
online
part
preteen
primary
question
raise
room
school
schoolboy
schoolchildren
screen
student
study
table
tablet
task
teacher
ten
video
wall
watch
year