1.The distance from CH to PT is a bout 10 km
=> It is about 10km from CH to PT
2.They are very interested in this play
=>They find this play interesting
3.She usually walked to work last year
=>She used to work last year
4.Athough Nam work hard,he didn't earn much money
=>Despite working hard, Nam didn;t earn much money
5.They celebrate Christmas day on December th 25
=>Christmas day is celebrated on December th 25