Final answer:
The question deals with English grammar, specifically comma usage and correct verb selection in sentence completion. Commas are used based on natural pauses, clause separation, and grammar rules. Correct verb selection requires understanding subject-verb agreement.
Step-by-step explanation:
The student's question touches on topics of English grammar, more specifically the use of commas in sentence structure and verb selection to complete sentences correctly. When reviewing the sentences provided, identifying the need for commas depends on the natural pause in the sentences, the separation of clauses, as well as standard grammar rules. For example:
- I finally found my keys, and I got to work just in time.
- Mrs. Contreras threw out her old coffee table and cleaned the carpet (no comma needed).
- Taking the elevator to the roof, we hoped we could see the skyline and the bay (no comma needed).
- 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 (no comma needed).
For verb selection, it's important to understand the subject-verb agreement and to choose the verb that corresponds accordingly with the subject. An exercise about completing the sentence with appropriate verbs was mentioned, however, without the full context or the list of verbs to choose from, a definitive answer cannot be provided.