选出不同类的单词。
( ) 1. A. Wednesday B. birthday C. Monday D. Saturday
( ) 2. A. rabbit B. monkey C. hamburgerr D. cow
( ) 3. A. cent B. cola C. milk D. tea
( ) 4. A. pond B. lake C. river D. mountain
( ) 5. A. airport B. balloon C. theatre D. park
( ) 6. A. flew B. spent C. bought D. become
( ) 7. A. rainy B. snow C. windy D. sunny
( ) 8. A. Geography B. study C. Science D. Physics
( ) 9. A. smile B. tired C. excited D. wonderful
( ) 10. A. October B. July C. September D. classmate