prepared/preparing? treated as/treated like?
Please look at these sentences:
1.The professor entered the room and seated himself in a chair, ________ for answering questions.
I know the best answer is "preparing", but I am just wondering if the following phrasings can fit the sentence?
prepared?having prepared?being prepared?
2.-Were they good to you during your stay there?
-Sure! I was _______ one of the family members there?
Why can't "treated like" fit the sentence?
Thank you in advance.