1. 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