1. I think Mr. M used the following sentence (Why not use the usual simple "into"?) in responding to one of
the posts, and I wonder why there isn't a word like 'preposition'
before the quoted word. -- There is no need for any other word before the quoted word; it is just what it appears to be, a quoted word. Another example: "What does 'egregious' mean?"
2. I hear a lot that Whom is generally used only in very formal
English and wonder which academic situtation (or non-academic
situation) would that be.
a) writing a report for a school assignment -- Yes
b) writing for an academic journal -- Yes
c) any kind of formal writing, i.e. excluding casual or personal correspondence.