找出下列不同类的单词,将其编号写在前面的括号里。
( )(1)A. housework B. homework C. apple
( )(2)A.sad B. monkey C. upset
( )(3)A. bring B. myself C. yourself
( )(4)A.rat B. rabbit C. cars
( )(5)A. apple B. lunch C. supper