Across
- 6. - this type of building was first built in Chicago in 1884
- 7. - the country with oldest continuous flag
- 8. - 1969 was the first time humans walked on the _ _ _ _
Down
- 1. - who wrote the first knock-knock joke?
- 2. - the first country to build a motorway
- 3. - The first _ _ _ _ _ _ _ _ A greek messenger ran from battle in 409AD
- 4. - the first food ever microwaved
- 5. - the city with the first professional police in the world