英文關鍵字
activity
adult
beautiful
blackboard
caucasian
chalkboard
cheerful
class
classroom
clever
cognition
college
confidence
conversation
cute
education
exam
explanation
female
gesture
girl
hand
happy
human
indoor
instructor
intelligence
joke
knowledge
laugh
learning
lecture
lesson
listening
meeting
occupation
person
presentation
pretty
school
seminar
smile
student
study
teacher
thinking
tutor
university
woman
young