选出不同类的单词
(1)A. food    B. floor      C. wall    D. fan
(2)A. door    B. classmate  C. window   D. light
(3)A. chair   B.desk        C.duck     D.blackboard
(4)A. boy     B.girl        C. woman    D.window
(5)A. light   B. fan        C. door    D.egg