单元：#Word List 21.txt

• cotton
• sister
• record
• butter
• hard
• statement
• off
• break
• seal
• plastic
• artist
• glue
• alright
• shoot
• doctor
• convenient
• terrible
• of
• glass
• careful
• more
• under
• diary
• shout
• eighty
• supply
• fashion
• punish
• bridge
• radio
• somewhere
• product
• never
• several
• insect
• banana
• volunteer
• district
• all
• reveal
• marathon
• smile
• rather
• ink
• discovery
• camera
• idea
• advantage
• hill
• clothes
• anything
• purpose
• beat
• association
• to
• lonely