Final answer:
The use of commas in the given sentences varies, depending on the clarity and flow of the sentence. The identification of subjects, intransitive verbs, and adverbials is based on their respective roles in the sentence structure. Selecting the correct verb would require further context that was not provided in the question.
Step-by-step explanation:
Understanding Commas and Sentence Structure
The use of commas in sentence structure is important for clarity and proper pacing. Reviewing the provided sentences, the correct comma placement or omissions are as follows:
I finally found my keys and got to work just in time.
Mrs. Contreras threw out her old coffee table and cleaned the carpet.
Taking the elevator to the roof, we hoped we could see the skyline and the bay.
Though Susan wasn't feeling well, she went to the store anyway and bought ice cream, pizza, and candy.
I let my neighbor borrow my phone because she said hers was tapped by the police.
Identifying Sentence Components
Identifying the subject, intransitive verb, and optional adverbial in each sentence:
Subject: We, Intransitive Verb: went, Adverbial: to the bowling alley on Friday.
Subject: Mr. Billingsworth, Intransitive Verb: laughed, Adverbial: at the antics of the class clown.
Subject: The ambassadors from Albania, Intransitive Verb: arrived.
Selecting the Correct Verb
The task requires selecting the correct verb for the incomplete sentences, although specific verbs have not been provided in the context of this question.