Leo stared at the blinking cursor. On his screen was a PDF: The file was corrupted, riddled with missing verbs and scrambled idioms. His boss, a meticulous editor named Mrs. Gable, had given him 24 hours to fix it.

He felt a surge of pride. Sentence by sentence, he repaired the PDF. "She was over the ______ when she got the promotion." (moon). "Let's ______ touch next week." (keep in).

"Use the Work module," she'd said. "The software can hear the mistakes."

But as he reached page 47, the voice changed. It deepened, grew metallic. "Final exercise. Real-world application."

Leo exhaled. He emailed the fixed PDF to Mrs. Gable. Subject line: