Superlative Degree of Adjectives

My brother is the (tall) one in the family.

To be an astronaut is my (great) dream.

I am the (young) one in the family.

The blue whale is the (large) animal in the world.

Hokkaido is the (cold) place in Japan during winter.

The Science test is the (hard) one so far.

My room is the (clean) room in the house.

She is the (kind) person I know.

Cherry blossoms are the (pretty) flowers I have ever seen.

My friend is the (happy) person I know.