改几个英语病句或者不合适的地方.

改几个英语病句或者不合适的地方.
1 I didn't know what was he studying.
2 I was scheduled to travel to Japan and it maade me exciting.
3 You are not working enough carefully.
4 The first reason why I study English is like it.
5 A doctor's income is greater than a teacher.
6My friend divorced last year.
7 I don't hope she comes.
8 I have a lot of homework to be done.