找出下列各组词中不同类的单词。
( ) (1) A. a hat B. a hot dog C. a vest
( ) (2)A. brown B. belt C. red
( ) (3) A. a pie B. a vest C. a hot dog
( ) (4) A. trousers B. pears C. shoes
( ) (5) A. a kitchen B. a study C. a camera