选出不同类的单词。
(   ) 1. A. winter      B. cool    C. spring     D. summer
(   ) 2. A. cool        B. cold    C. warm       D. walk
(   ) 3. A. skate       B. swim    C. climb      D. season
(   ) 4. A. first       B. two     C. second      D. third
(   ) 5. A. May         B. July    C. Sunday     D. June