选出下列各组单词中画线部分读音与其他三个不同的一项。
( )(1) A. yellow B. flower C. window D. know
( )(2) A. book B. school C. look D. cook
( )(3) A. warm B. garden C. market D. party
( )(4) A. tiger B. her C. teacher D. over
( )(5) A. these B. they C. brother D. three