Answer:
the ruins of a great temple in the mid-city
The answer is how many,as an adverb typically describes how things are done in a certain manner,the place,time,etc;
Last summer I happened to be crossing the plains
That's definitely informal because of the contractions used such as "'cause" and "y"all" and also because of the word phrasing such as "chow down" and "totally awesome."
Education through eighth grade is primary/elementary school