Respuesta:
a. was - Was
b. was
c. were
d. weren't
e. wasn't
f. was - were
g. were
Explicación:
Verbo to Be en pasado
Was - era o estaba
Were - eran o estaban
was - se complementa con I - He - She - It
were - se complementa con You - We - They
deacuerdo con el de arriba
