PUZZEL

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Across
  1. 2. I have more than 100 keys.Yet I cannot unlock a single door.
  2. 5. Twenty-two people chase me.One goal changes everyone's mood.
  3. 8. Everyone receives me.Nobody wants me near the deadline.
  4. 9. I copy every step you take.But disappear when darkness arrives.
  5. 10. I have hands but cannot clap.I keep moving without taking a step.
Down
  1. 1. I beat over 100,000 times a day.Yet I never get tired.
  2. 3. I never eat anything.Yet I keep everyone's food fresh.
  3. 4. I become quiet during exams.A board stands at my front.
  4. 6. You keep borrowing me every second.Without me, silence lasts forever.
  5. 7. I can be smaller than one.Still, I represent a complete idea.