找出画线部分读音与其他单词不同的选项,将序号填入括号内。
( )(1)A. good B.cook C.moon
( )(2)A.forty B.doctor C.morning
( )(3)A.brown B.how C.window
( )(4)A.duty B.bus C.must
( )(5)A.horse B.house C.mouse