1.
a Rome ( Rome is a country . Italy, London, Madrid are cities)
b Paris ( Paris is the city of France. New York, Washington and San Francisco are the cities of America )
c Africa ( Africa is a continent . USA, England, Japan are state)
d London ( London is a city, the capital of Great Britain. Manchester United, Arsenal, Barselona - the name of the football clubs)
e skiing ( football, tennis and basketball are kind of play with balls
f Michael Jordan ( Michael Jordan is a baseball player) )