Question

7-A: What you doing at one o'clock?
was p were​

Answer 1

Respuesta:

What were you doing at one o'clock?

Explicación:

Ya que cuando se dice you was o was you está incorrecto, además were you o you were si está correcto.

Answer 2

What were you doing at one o’clock?
Explicación: el to be en pasado con you es were