单元：Unit 01.txt

• teenager
• ballet
• volunteer
• debate
• prefer
• content
• movement
• greenhouse
• clean up
• suitable
• suitable for
• actually
• challenge
• title
• topic
• freshman
• confusing
• confuse
• confused
• fluent
• graduate
• recommend
• advanced
• advance
• literature
• extra-curricular
• extra
• obviously
• quit
• responsible
• responsibility
• be responsible for
• solution
• schedule
• editor
• plate
• adventure
• youth
• survival
• expert
• behaviour
• generation
• attract
• be attracted to
• focus
• focus on
• addicted
• addict
• addicted to
• adult