Official ETS gre verbal reasoning qestions

GRE Verbal Problem Solving
1

Practice set 1

The name of the Sloane Matthew Library has long been ____ ; even longtime
city residents assume it is a run-of-the-mill library, never suspecting
what art treasures it contains.
A revered
B proposed
C misleading
D elevated
E intriguing

i marked it OPTION D ELEVATED because the word long is supported and longtime residents assume it is run of the mill library and the comma supports the previous statement.
but the correct answer is OPTION C MISLEADING

can someone explain?

2

What do you think “run of the mill” means?

3

it means nothing special right?

4

How does “elevated” support the idea of nothing special?

5

elevated doesn’t support nothing special but if long time residents thought of it nothing special
means it’s name/reputation increased?

6

How? Why does thinking of something as “nothing special” increase its reputation?