Final answer:
The sentences were reviewed for proper comma usage, requiring the addition of commas to separate items in a list, after introductory phrases, and before coordinating conjunctions linking independent clauses.
Step-by-step explanation:
The task involves inserting missing commas or omitting incorrectly placed commas in a series of sentences to improve clarity and grammatical correctness. Here is a review and editing of the provided sentences:
- 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.
- Taking the elevator to the roof, we hoped we could see the skyline and the bay.
- Though Susan wasn't feel 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.
Commas are used to separate items in a list, after introductory phrases, to link independent clauses with a coordinating conjunction, and to set off nonessential information for clarity.