Find the odd.(在每组中选出不同类的一项)
（1）A.I’m sorry.        B.good idea.      C.good job
（2）A.clean the doors     B.sweep the floor.  C.my new desk
（3）A.a story book      B.a math book     C.an old eraser
（4）A.an English teacher  B.a Chinese car   C.a music teacher
（5）A.curly black hair    B.big green eyes    C.on your head
（6）A.He’s so strong     B.he has a cute face  C.he likes sports