Ответ:

1. the best

the busiest

the most famous

the biggest

the most difficult

the quietest

the worst

the most expensive

2. least

least

most

most

most

3. Italy is the most expensive

the friendliest people

Greece is the most relaxing

Italy has the nicest food

Italy is is the noisiest

whi is the best

4. 2) A: Rome is the most famous city in Italy

B: Yes, but Venice is the most beautiful Italian city

3) A: New York is the busiest city in the USA

B: Yes, and it's the coolest city in the world

4) Athens is the most dangerous city in Greece

B: Yes, but Greece is one of the safest countries in Europe

5) A: London is the most exciting city in Britain

B: Yes, but it's the most expensive city in the country