Take another look at the original sentence:

Susan ducked down when she saw Mr. Hayden, her English teacher, walk into Tito's Taco Palace, unfortunately, a burrito wasn't big enough to hide behind, so poor Susan had to explain why she had missed his class again.

You wanted to fix it this way:

Susan ducked down when she saw Mr. Hayden, her English teacher, walk into Tito's Taco Palace; Unfortunately, a burrito wasn't big enough to hide behind, so poor Susan had to explain why she had missed his class again.

A semicolon is an excellent way to fix a comma splice. You must be careful, however, that you don't capitalize the word that follows the semicolon. Unless the word following the semicolon is a proper noun, one that is always capitalized, you should leave it with a lower case letter.

You might want to consult the rules for fixing comma splices and fused sentences.

Go back to the sentence to try again.

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