找出画线部分读音与其他三个不同的单词。
( ) (1)A.book B. look C. food D. good
( ) (2)A.thin B. that C. Father D.brother
( ) (3)A.cake B. clock C. Face D.cat
( ) (4)A.ear B. pear C. hear D.tear
( ) (5)A.he B. pen C. egg D.desk