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.meat B. monkey C. bread
( )（3）A.bring B. interesting C. difficult
( )（4）A.food B. fruit C. cars
( )（5）A.tennis B. hamburger C. baseball