Why does the first sentence turn out to be ironic? In the living room the voice-clock sang, "Tick-tock,
seven o'clock, time to get up, time to get up, seven
o'clock!" as if it were afraid that nobody would."

If people hear this, they probably will not want to wake up at seven o'clock anymore.

Explanation:

An ironic situation is one where an attempt to cause a desired outcome actually results in an undesired outcome, or one where something happens that's opposite to what you'd expect.

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