Помогите составить вопросы к пр-ию на английском.

Did our mother send three letters to her wonderful sister in Sochi a month ago?

Who sent three letters to their wonderful sister in Sochi a month ago?

Whom did our mother send three letters a month ago?

When did our mother send three letters to her wonderful sister in Sochi?

Did our mother send three letters to her wonderful sister or brother in Sochi a month ago?

What did our mother sent to her wonderful sister in Sochi a month ago?

How many letters did our mother sent to her wonderful sister in Sochi a month ago?

Our mother sent three letters to her wonderful sister in Sochi a month ago, didn't she?