Take another look at the sentence:

Natalya quietly unzipped her book bag, removed a bottle of pink polish, and __________ while Dr. Adams droned on and on about the Mesopotamians.

The blank needs to begin with a simple past tense verb. You chose she began painting her fingernails, which is a main clause and thus causes a parallelism error.

Before you continue, review the rules for parallel structure.

Go back to the sentence to try again.

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