单元：List-21.txt

• place
• able
• nearly
• power
• true
• vital
• native
• parcel
• material
• likely
• cloudy
• system
• late
• interpreter
• everybody
• harbour
• knee
• talk
• before
• wild
• dangerous
• temporary
• compare
• plot
• rest
• endless
• type
• worry
• junior
• dialogue
• second
• envy
• everything
• entrance
• pavement
• register
• active
• reliable