1：his campaign 中的his改成their
2：that was改成 that is
3：or 改成 and
4：If I was you中的was改成were
5：interests 改成interesting
6:occurring 改成occurred
7：in a previous meeting.中的a改成the
8：of改成with
9：more去掉
10:did改成had
11：exchanging 改成exchanged
12：your改成you
13：a改成the
15：goodly改成good