The reason why I didn't perform well in part 7 was partly I spent too much time on part 5 and 6. I just think so.
I haven't practiced a lot for TOEIC, but I think I should study for the test if I want to get a good score.
I'll concentrate on Part 5 and 6, so I'll buy some text books for the section. Otherwise, I can't get over 400 for TOEIC reading part.