Make a question using the Past Perfect Tense.
- I didn't know how to withdraw money from the cash machine.
- (you | not do | it | before)?

К сожалению, у нас пока нет статистики ответов на данный вопрос, но мы работаем над этим.

Make a question using the Past Perfect Tense.- I didn't know how to withdraw money from the cash machine.- (you | not do | it | before)?