<span>He is surprised by the question and says that owning books is against the law.</span>
Answer:
I believe it was written in 1955 or 1956 or around that time.
Explanation:
(I looked it up just to make sure I was correct and it is 1955)
No they aren't proper to use in writing class they are considered slang. It would show your teacher that your not interested in sounding educated and proper.
Hope this helps!