this questions related to Tax Accounting subject

I will attach to documents here
1-the one supposed to be answerd
2-the solution of the questions
you will see that the second one is answered already with the multiple choices only.
and also mine is answered but it is not completed, I just answered the multiple choices but not sure with the answers.
So please try to answer the questions that after #15 .. 1-Exchange problems, 1231 problem, cost recovery problem and short prblems.
and correct what is wrong from 1-15
Thank you.