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. bus      B. fun      C. cute        D. cup

② A. blow      B . now      C. know       D. snow

③ A. name      B. take      C. date        D. sat

④ A. teacher      B. each      C. tea         D. deaf

⑤   A. heavy      B. breakfast   C. great       D. sweater