写出下列单词的复数形式。1. dog ___________________
2. puppy ___________________
3. lion ___________________
4. baby ___________________
5. cat ___________________
6. piglet ___________________
7. horse ___________________
8. calf ___________________
9. goose ___________________
10. joey ___________________
11. duckling ___________________
12. hen ___________________
13. mouse ___________________
14. child ___________________
15. knife ___________________
试题答案
1. dogs 2. puppies 3. lions 4. babies 5. cats 6. piglets 7. horses 8. calves 9. geese 10. joeys
11. ducklings 12. hens 13. mice 14. children 15. knives