V) 

1 . We didn't use to go to school by bus

2 . He used to ride a bike for exercise

3 . Did Tim use to be a taxi driver ?

4 . He didn't use to smoke ten cigarettes a day

5 . Did you use to ride a motorbike without wearing a helmet ?

6 . There used to be many trees on the streets

VI)

1 . I didn't use to listen to Western music some years ago

2 . My mum used to be a chef in Cham restaurant

3 . There used to be a market here in 2003

4 . There used to be fewer cars on the road in the past

5 . She used to be my idol when I was a child

6 . They didn't use to know how to drive a car