Question

Mary____ill last week
was o were?

Answer 1

was porque se refiere a ella y she va con was :)

Answer 2

Respuesta:

¡Hola!

La alternativa correcta es WAS.

Were se usa cuando se habla de ellos o nosotros (En ingles They o We)

Ejemplos:

We were at the supermarket.

They were at their house.

Espero te ayude :-)