Parabéns!

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Across
  1. 4. The Roma Colosseum is one famous one
  2. 5. To plunge head first
Down
  1. 1. "Jack ... nipping at your nose"
  2. 2. ...Placid, Venue of the Winter Olympics in 1932 & 1980
  3. 3. Elmo lives on Sesame...