Choose the group of words that form a complete sentence.

• A. Wind, fire, water—elements of the Earth.
• B. We're off!
• C. Helps us save money on car insurance and fuel costs.
• D. My neck of the woods.

Answer: (B)

A complete sentence needs a subject and a predicate and must express a full thought. “We’re off!” has the subject “We” and the verb “are,” with “off” completing the idea, delivering a full, stand-alone statement. The other options are fragments: they lack a finite verb with a clear subject or do not form a complete thought. For example, “Wind, fire, water—elements of the Earth” is a noun phrase rather than a full sentence; “Helps us save money on car insurance and fuel costs” lacks a clear subject; and “My neck of the woods” is just a place phrase. So the only complete sentence is “We’re off!”