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Так:

Did she use to wear make-up

Did our city use to be so dirty

Did my dad use to smoke

Did our grandparent use to live only in the country

Did my dog use to be so strong

Did my mom use to work as a dentist

Did the Ford cars use to be very expensive

Did the singer use to be very popular many years ago

Did he use to wear long heir when he was a student

Потому что так