选出不同类别的词。
( ) 1. A. will
( ) 2. A. happy
( ) 3. A. worker
( ) 4. A. when
( ) 5. A. grass
( ) 6. A. can't
( ) 7. A. really
( ) 8. A. eye
( ) 9. A. lovely
( ) 10. A. neither
( ) 11. A. hotter
( ) 12. A. people's B. start
B. quickly
B. rider
B. win
B. forest
B. mustn't
B. smell
B. inside
B. but
B. either
B. cold
B. father's C. come
C. slowly
C. stop
C. which
C. must
C. may
C. sound
C. ear
C. soft
C. others
C. warmer
C. uncle