Answer my questions..if u can

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I would like to ask four questions which i couldn't find the answers....asnwer me if u can...good luck.... 1. If a turtle doesn't have a shell, is he homeless or naked? 2. Is there another word for synonym? 3. How is it possible to have a civil war? 4. If the "blackbox" flight recorder is never damaged during a plane crash, why isn't the whole damn airplane made out of that stuff?