找出不同类的单词。
(   ) 1. A. coach     B. father     C. teacher     D. cleaner
(   ) 2. A. museum  B. bookstore    C. fisherman   D. supermarket
(   ) 3. A. bus      B. foot        C. plane       D. subway
(   ) 4. A. hiking   B. swimming    C. straight     D. singing
(   ) 5. A. angry     B. sad        C. happy       D. feel