Question

как правильно написать  предложения  во  множественном  числе 
It`s a ruler.
It`s a chimp.
It`s a school.
It`s a rubber.
It`s a pen.
It`s a pencil case.
It`s a school bag.

Answer 1

these are rulers
these are chimps
these are schools
these are rubbers
these are pens
these are pencil cases
these are school bags.............