Задать всякие вопросы yesterday my mom was cooking dinner at 6: 00 pm

Was your mother cooking dinner yesterday at 6 o'clock?
What was your mother doing at 6 o'clock yesterday?
Who was cooking dinner at 6 o'clock yesterday?
Was your mother cooking dinner or watching TV at 6 o'clock yesterday?
Yesterday your mum was cooking dinner at 6 o'clock, wasn't she?