U4 posttest

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Across
  1. 3. No jokes about this dog star
  2. 5. Latin for "in the middle of things"
  3. 7. developer of Instagram
  4. 9. DJ pal of The Fresh Prince
  5. 13. Greek guy who was right about right triangles
  6. 14. "Boy And The Heron" director
  7. 16. Let the jokes about this dog star fly
  8. 17. rodent in the public domain this year
  9. 18. fearsome Mongol conqueror
Down
  1. 1. divides cells
  2. 2. divides sales
  3. 4. he'd give you an earful about his art, but...
  4. 6. to shrivel up, or what teams hope to win
  5. 8. fast food chain with $3 Cravings Value menu
  6. 9. reigning NBA Finals MVP
  7. 10. piano-playing aardvark
  8. 11. this year's Super Bowl halftime performer
  9. 12. home of this year's summer Olympics
  10. 13. Louisiana equivalent of a county
  11. 15. he's not a [2 down], he's a [2, down]