Give the singular of the following nounsPotatoes, feet, shelves, stories, cities, pianos, valleys, men, women, children, teeth, heroes, lives.

ответ:Potato.foot.shelf. story. city. piano. valley. man. woman. child. tooth. hero. live.

Объяснение:

1. we have just come home but our children came home an hour ago. 2. i have already come from school. now i am having dinner. 3. have you written  a letter to your friend today? 4. did you sent him a telegram last week? 5. she has never driven a car before. 6. he has read the text and now he can retell it. 7. jane hasnot be at the cinema this week. 8. don't you    know who has opened the door? 9. five years ago he was a typist. 10. when did he see  you?   - he has seen me this week. 11. it's the best thing he has ever made. 12. where have i  put my beg? i can't find it. 13. we have seen her twice today. 14. i am happy. i just received a telegram from my friend. 15. when did they move to a new flat? — they  moved there last month. 16. did somebody telephone  me? - your mother has telephoned you three times this morning. 17. they lived in france in 1970. 18. when did it  stop raining? — it stoped raining two hours ago. 19. the wind has stoped blowing and the weather is getting warmer. 20. he  stoped smoking some years ago.