Final answer:
To move the plot forward, the sentence that should be added is: "Once I arrived, I quickly learned that my job would also entail wiping tables, mopping floors, and washing dishes."
Step-by-step explanation:
To effectively move the plot forward in the personal narrative, the sentence that should be added after sentence 6 is: O Once I arrived, I quickly learned that my job would also entail wiping tables, mopping floors, and washing dishes. This sentence introduces new information about the protagonist's job duties, which adds to the development of the plot. It highlights the contrast between the excitement the protagonist initially felt and the reality of the job.
Learn more about Personal narrative and plot development