找出类别与众不同的单词。
(1)A. China  B. English   C. America       D. Japanese
(2)A. pen    B. pencil    C. pencil- box    D. ball pen
(3)A.write  B. farmer    C. visitor       D. singer
(4)A. school B. hospital   C. farm          D. student
(5)A. blue   B. small     C. long          D. big