1.live->living
2.turned on->on
3.in class->in his class
4.forgot->left
5.stands->stand
6.after->since
7.How->What
8.progresses->progress
9.Joe our congratulation->our congratulation to Joe
10.On the Christmas Day->On Christmas Day
11.who->that
12.a terrible weather->terrible weather
13.hope->wish
14.others->the others
15.runs not->doesn't run
16.of his school->in his school
17.too much->much too
18.expensive->much
19.least->less