求将以下几个英语句子改正过来.(每句只有一处错误）
1.They want different book.
2.Each of us has a good plan for the holidays.
3.I think you can stay there for some time.
4.The book is interested.
5.How many money do you earn per month?
6.They go to Beijing the dai before yesterday.
7.How did you made your trip?
8.It was very different from his.