Question

There was X there were (Aff/ Neg/int

Answer 1

Resposta:

There was a Percy Jackson's book.

There wasn't a Percy Jackson's book.

Was there a Percy Jackson's book?

There were kids in this house.

There weren't kids in this house.

Were there kids in this house?

Explicação:

Note que a estrutura das frases é a msm. A única parte que sofre modificação é o verbo to be (was/were).

Espero ter ajudado. :D