1: d) have did
2: b) had done
3: c) had cleaned-called
4. b) had told
5: a) told-had left
6: a) had finished
7: b) heard
8: c) had written
9: b) had gone
That dose look good. I would take out from "...or based on facts". Art is mainly based off of opinion. I would say that "Art and what it has done has changes the world greatly."
Hopes this helps.
Inserting dialogue, or commentary is simple. Simply use quotation marks " " around what a person is saying, and then after that close off the sentence by stating who said it and how. For example: "I can't believe I won free tickets!", Anna exclaimed.
