Hello, Mr.Scafe

This is jungmin choo.
I finished my final exam...but I'm not very satisfied with my score.
I studied a lot. but I failed to get an answer. Shame on me.

Anyhow, I got all the wrong answers for the tricky questions. #2, #9, #10
Could you comment on each of the wrong answers I did?
I know some reasons, but I want to know more exactly, not only with my guessing.

Thank you.
Warm regards,
jungmin choo.