找出类别与众不同的单词。
(1)A. walk   B. hear     C. sleep   D. coconut
(2)A. windy  B. cloudy   C. ruler   D. sunny
(3)A. Canada B. Beijing   C. China   D. America
(4)A. red    B. green    C. summer   D. black
(5)A. girl   B. pig      C. dog     D. eat