- This book is the lightest and ______ (thin) of all the books.
- We would brush our _______ (tooth) twice a day.
- One day, Mr Green asked Mrs Green ______ (go) shopping for him.
- My mother's work is _____ (make) our city safe.
- The boys like to listen to music when they do ______ (they) homework.
- mouse________ (复数)
- photo_______ (复数)
- swim_______ (现在分词)
- boy_______(复数)
- I_________ (名词性物主代词)
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