[Instructors: Download PDFs of the exercise and exercise key at the end of the post.]
Careful writers use commas to separate three or more equal elements (words, phrases, or short clauses) in a series. To ensure separation of the last two elements, always use a comma before the conjunction in a series, known as the Oxford comma.
The event committee was meeting to discuss guests, invitations, venues, and costs.
[commas in a series of words]
Agenda items included a report on hiring practices, discussion about open positions, and review of the previous week’s e-mail blast.
[commas in a series of phrases]
Marketing will focus on creating the messages, production will mock up a sample, and sales will devise a distribution list.
[commas in a series of clauses]
Correct the punctuation in the sentences below.
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