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