1. One pen two 2. One pencil - three 3. One baby-four 4. One brush five 5. One potato - six 6. One tree seven 7. One fly-three 8. One desk - four 9. One letter - three 10. One skirt - two 11. One key four 12. One disk - two 13. One match three 14. One clown - two three 15. One room 16. One apple - four -пожалуйста помогите срочно надо!!+​

Ответ:

One pen - two pens.

One pencil - three pencils.

One baby- four babies.

One brush- five brushes.

One potato-six potatoes.

One tree -seven trees.

One fly- three flies.

One desk -four desks.

One letter-three letters.

One skirt- two skirts.

One key- four keys ( это исключение из общего правила образования множ.числа существительных)

One disk-two disks.

One match-three matches.

One clown-two clowns.

One room-three rooms.

One apple- four apples.