Parallel structure: means using the same pattern of words to show that two or more ideas have the same level of importance in the sentence
so maybe ... " but the good introduction she had been writing all night did not meet her standards "
I'm not 100% sure on my parallel structured ending suggestion.lol
Answer:
Last, Colorado, Denver, Vail
Explanation:
Last year we went to Colorado and visited Denver, Vail, and two other cities.
Last is capitalized because it starts the sentence. The others are capitalized because they are proper nouns.