找出斜体部分读音与其他三个不同，把序号填在括号内。
( )(1)A. bear B. there C. hear D. pear
( )(2)A. ready B. nineteen C. heavy D. sweater
( )(3)A. word B. doctor C. worker D. forty
( )(4)A. their B. thanks C. brother D. this
( )(5)A. bags B. hens C. maps D. farmers
( )(6)A. cool B. goose C. school D. good