Question

4) A forma negativa de "There was an animal in front of the classroom" é: a) There wasn' an animal in front of the classroom. b) There was no an animal in front of the classroom. c) There wasn't an animal in front of the classroom.

Answer 1

c) There wasn't an animal in front of the classroom.

O verbo "was" (estava/era) no modo negativo fica "wasn't" (não estava/não era), que é o modo simplificado de "was not".