找出下列“不合群”的單詞
1. A. pupil B. son C. family D. student
2.A. book B. water C. chair D. map
3. A. home B. Africa C. school D. hospital
4. A. air B. rice C. friendship D. bread
寫出下列單詞的復(fù)數(shù)形式:
month 2. horse 3. class 4. fox
story 6. knife 7. zero 8. zoo
9. sheep 10. tooth 11. son-in-law 12. man-teacher