1. 根据读音规则，判断下列各组单词中哪一个单词划线部分的读音与其他三个不同。

① A. hand B. cake C. map     D. bag

② A. red     B. bed C. me     D. let

③ A. bread B. meat C. tea     D. eat

④ A. car     B. far C. warm     D. hard

⑤ A. go  B. dog C. clock     D. orange