选出下列各组单词中画线部分发音不同的一个：
⑴A. boy     B. body     C. nose       D. fox
⑵A. she     B. these    C. bell       D. he
⑶A. hammer   B. name      C. jam        D. apple
⑷A. nice     B. fine      C. this      D. white
⑸A. duck    B. put      C. bus       D. umbrella
⑹A. room    B. look     C. food      D. root