Let's analyze each of the provided phrases or sentences to determine which are fragments:
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Driving an automobile while talking on a cell phone to his girlfriend.
- This is a -ing fragment. It does not form a complete thought because it lacks a main clause to complete the idea.
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Before I had my driver's license, I used to ride the bus.
- This is a complete sentence. The phrase "Before I had my driver's license" is an introductory dependent clause, but it is followed by an independent clause, so the entire sentence is complete.
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Lucy fell behind her teammates during the 6K race.
- This is a complete sentence. It has a subject ("Lucy") and a predicate ("fell behind her teammates during the 6K race"), making it independent.
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When John went to his first day of classes at the local community college.
- This is a dependent clause fragment. It begins with "When," indicating it is subordinate, and it lacks a main clause to complete the thought.
In summary:
- Fragments: 1 (Driving an automobile while talking on a cell phone to his girlfriend) and 4 (When John went to his first day of classes at the local community college).
- Complete sentences: 2 (Before I had my driver's license, I used to ride the bus) and 3 (Lucy fell behind her teammates during the 6K race).