Final answer:
The sentence written with a pronoun form appropriate for academic writing is 'After we played together one afternoon, we decided to call ourselves The Crash.'
Step-by-step explanation:
The sentence written with a pronoun form appropriate for academic writing is:
After we played together one afternoon, we decided to call ourselves The Crash.
The pronoun 'we' is a subject pronoun used to refer to the group of people who played together. This sentence is appropriate for academic writing as it uses a professional and formal tone.
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