Ask and answer
How many sofas are there?
There are

How many (sofas) are there? Сколько там (диванов)?
и ответы:
There are (two)./There is only one. Два./Только один.

Ответы:

A: How many chairs are there? Сколько там стульев?
B: There are four. Четыре.

A: How many cupboards are there? Сколько там шкафов?
B: There are two. Два.

A: How many mirrors are there? Сколько там зеркал?
B: Theres only one. Только одно.

A: How many beds are there? Сколько там кроватей?
B: There are two. Две.

A: How many boxes are there? Сколько там коробок?
B: There are five. 5.

A: How many computers are there? Сколько там компьютеров?
B: Theres only one. Только один.