7, We used to lit our house with candles.
8, We used to spend our childrenhood on the farm.
9, There used to be some trees in the field.
10, We used to write to each other very often.
11, Huynh Duc used to be a skillful football player over 10 years ago.
12, He used to play tennis than he does now.
13, That computer doesn't work as well as this one.
14, We used to go to Phan Thiet at weekends.
15, Nam asked Ba if Ba could help he with that problem.
16, A bicycle is not as expensive as a car.
17, His family has lived in Hue since he was 7 years old.
