He smoke detector in Mikeli's busy caf failed to work when a grease fire broke out.

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Question:

He smoke detector in Mikeli's busy caf $é$ failed to work when a grease fire broke out. Mikeli's manager, Henry, had asked Mikeli $�$ the smoke detector last week, but the restaurant was so loud that Mikeli didn't notice Henry was speaking to him. Which of th ffective listening did Mikeli fail to follow?