You need a comma after "at first". get rid of the second period in the fourth sentence. get rid of "but only the buildings."
I took a test on this and my answer was correct to show emphasis the helping verb would be DO SO (A) is the correct answer
Monotone is referred to having a one, single tone that is usually described as flat and does not either rise nor lower in pitch.
No, “alliterating” is not a word