Напишите существительные во множественном числе, как показано в образце образец : chimp (11)- eleven chimps book (20) pen (17) pencil (19) pencil case (15) school bag (18) ruler (13) rubber (16) school (14) subject (12)

Twenty books
seventeen pens
nineteen pencils
fifteen pencil cases
eighteen school bags
thirteen rulers
sixteen rubbers
fourteen schools
twelve subjects