Caesar's English lesson 9

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Across
  1. 1. one who sails the sea
  2. 3. Something that can't be touched
  3. 5. a word that connects two sentences
  4. 7. lasting for a limited amount of time
Down
  1. 1. the middle value of an ordered dataset
  2. 2. under the moon
  3. 4. a particular place or position
  4. 6. material that lets light pass through