找出不同类的单词
(    )（1）A.favorite     B. swimming      C. painting
(    )（2）A.geography    B. history         C. sing[
(    )（3）A.boring      B. interesting       C. club
(    )（4）A.classmate     B. kid             C. easy
(    )（5）A.themselves    B. she           C. yourself