选出下列单词中划线部分读音不同的选项,将其序号填入题前括号内
( )(1) A. Forget B. her C. work D. nurse
( )(2) A. these B. father C. think D. mouths
( )(3) A. any B. catch C. black D. stamp
( )(4) A. book B. good C. food D. classroom
( )(5) A. Pens B. teachers C. apples D. cats