1.a

B a

A Is there a

B there isn't; there is a

A are there

B There are

A Is there a

B there is

A Are there any

B there are some

1.b

2) Are there any carpets downstairs?

3) There are some CDs on the shelf.

4) Are there any glasses in the cupboard?

5) There aren't any files in the study.

1.c

it isn't

There are

they aren't

It is

There isn't

there's

it is

there's

They are