they used to write everything by hand 
->they usually .....wrote everything by hand in the...past.......
the traffic was heavy, but they went to work on time
->though ...the traffic was heavy, they went to work on time...........................

they usually write _______
though the heavily trafiic, they went _______

1. They usually wrote everything by hand.
2. Though the traffic was heavy, they went to work on time.
Duy Hùng