Signs and instructions

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Across
  1. 3. on the floor or walls; it is dirty.
  2. 6. in the museum; it makes noise to others.
  3. 7. on the pagoda; other people are paying homage.
  4. 8. when the teacher is teaching.
  5. 10. in the restaurant; other customers don't like it.
Down
  1. 1. in the river because it is dangerous.
  2. 2. in the street; throw your rubbish in a dustbin.
  3. 4. in the hall; there is a canteen outside.
  4. 5. in the supermarket; keep yours outside.
  5. 9. in the library when other students are reading.