It vai There?

______ is a book on the table.
It
There

______ is raining.
It
There

______ are twenty students in the class.
It
There

______ was nice to see you.
It
There

______ seems that nobody knows the answer.
It
There

______ were several mistakes in the report.
It
There

______ is impossible to know everything.
It
There

______ has been an accident on the motorway.
It
There

______ is getting colder.
It
There

______ must be another solution.
It
There