找出下列单词中不同类的一项。
( ) 1. A．principal B．teacher C．school D．student
( ) 2. A．cabbage B．pork C．eggplant D．carrot
( ) 3. A．fresh B．food C．salty D．sweet
( ) 4. A．cook B．sweep C．river D．set
( ) 5. A．under B．near C．sky D．behind
( ) 6. A．closet B．kitchen C．bedroom D．bathroom
( ) 7. A．grass B．tree C．flower D．cloud
( ) 8. A．clean B．farm C．park D．city
( ) 9. A．tomorrow B．Monday C．Friday D．Thursday
( ) 10. A．thin B．tall C．quiet D．strong
