选出不同类的单词。 ( ) 1. A. giraffe ( ) 2. A. apple ( ) 3. A. plane ( ) 4. A. mouth ( ) 5. A. left ( ) 6. A. August ( ) 7. A. second ( ) 8. A. yours ( ) 9. A. swim ( ) 10. A. worker B. elephant B. yellow B. subway B. north B. right B. Sunday B. three B. mine B. football B. father C. eggplant C. strawberry C. foot C. south C. night C. Friday C. first C. our C. play C. grandfather