General Knowledge 1

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Across
  1. 3. You need this if you want to play soccer.
  2. 6. This is the most popular musical instrument.
Down
  1. 1. They are the basic unit of all living organisms.
  2. 2. Without this, we couldn't survive on Earth.
  3. 4. The colors of the USA flag are white, red, and...
  4. 5. Pizza was invented in this country.