There’s six secretaries in the company.
= There are six secretaries in the company.
Are there any female secretaries?
= There are any female secretaries
There are one security guard here.
= There is one security guard here
There is some visitors at the reception
=There are some visitors at the reception
There is some clients in the meeting room
= There are some clients in the meeting room
Are there any coffee left?
= There is any coffee left?
There isn’t a computer at reception.
= Ther aren’t a computer at reception.