Copy with sed 's//'

I have a file with various 'return BBQ;' statements. I'd l开发者_开发问答ike to change them all to 'exit(BBQ);\nreturn BBQ;' (with BBQ being an arbitrary value). Is this possible?

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Backreferences.

s/return \(BBQ\);/exit(\1);\nreturn \1;/