Prepositions – at, in, on – Test

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Task Nr. 3023

Which of the following prepositions at, in or on can be put before the following words or phrases?

  1. the radio
  2. the moment
  3. sea
  4. the age of 21
  5. horseback
  6. once
  7. total
  8. work
  9. French
  10. home