Whose backpack is this?— It be Mary’s. She is looking for hers.

There ______ lots of bad information which is not ____ for teenagers on the Internet.

I think English is __________ unimportant subject.— I don’t think so. It is __________ useful tool when we talk with foreigners.

The little boy is too young to dress ____________, let’s help him.

My brother and I have a box______ many school things_______it.[ ]