I don’t think it’s a run-on sentence (might be wrong) because it has a subordinate clause and when taken out everything makes sense?
So yeah, I think it isn’t a run-on sentence.
Answer:
no mask, I have my real face on
Explanation:
Answer : alliteration
They marched in step, hurrying on till the timbered hall
rose before them, radiant with gold. Nobody on earth knew of another
building like it. Majesty lodged there, its light shone over many lands.
Answer:
a. "unless it was quite necessary"
Hope this helps :)