The key answer of exercise 2

a)

1. the best
2. the friendliest
3. The safest
4. the least attractive
5. the wettest
6. the furthest

b)

1. He's the rudest person I've ever met.
2. It's the most beautiful building we've ever seen.
3. That's the most expensive thing I've ever bought.
4. It's the best photo you've ever taken.
5. That's the worst flight we've ever had.

c)

1. What's the most beautiful city you've ever been to?
2. What's the worst hotel you've ever stayed in?
3. What's the best holiday you've ever had?
4. What's the most interesting museum you've ever visited?
5. What's the nicest restaurant you've ever been to?