1 it is not difficult to find books about animals in our school library 为什么是it

it is not big it is not my it is not it is not goodbye it is not It is not.,but. It is not ( )you no,is it not It is not you ,()it? it is pretty,is not it? It is not yours,it is mine. It is ( )ruler.It is not( )eraser. it not clear that this is not It is not until that It is not your fault Thus it is not merely It is not really my It is not about you