Заполните пропуски: Вставьте used to, didn't use to или Did ... use to.

a) My grandfather used to ride a bike when he was young. b) We used to live in the countryside before we moved to the city. c) Did you use to play any musical instrument? d) She didn't use to like pizza, but now she loves it. e) They used to go to school by bus, now they walk.