Перепишите данные предложения, употребив существительные во множественном числе и сделав соответствующие изменения:

This is a big country.
The life of this man was hard.
Is that a mouse or a rat.
There is a leaf under the tree.

These are big countres.The lives of these men were hard. Are those mice or rats? There are some leaves under the tree.