Final answer:
At an accident scene without a C.B. radio, the first thing to do is ensure your own safety and assess the situation. Then, provide first aid if needed and call emergency services to report the accident.
Step-by-step explanation:
When you do not have a C.B. radio at an accident scene, the first thing you should do is assess the situation and ensure your own safety. You should then check for any injuries and provide first aid if necessary. Next, you should call emergency services, such as 911, to report the accident and provide them with accurate information about the location, number of individuals involved, and any immediate hazards. It is important to remain calm and follow the instructions provided by the emergency operator.