选出每组中不同类的单词，将它的编号写在左边的括号中。
(     )⑴ A.ruler          B.arm           C.body
(     )⑵ A.white          B.red            C.orange
(     )⑶ A.mouth          B.foot          C.school
(     )⑷ A.black           B.brown          C.face
(     )⑸ A.my             B.bag           C.your