comparative and superlative

What is the superlative of "careful" ?

What is the comparative of "strange" ?

What is the comparative of "quickly" ?

My brother is __________ _______ me at basketball. (good)

• better than

• gooder than

• the goodest

• the best

The Atacama is ____ _______ desert on Earth. (dry)

• the driest

• the dryest

• the dry

• drier than

These are ____jeans ever!

• the more expensive
• the expensivest
• most expensive
• the most expensive 

Messi is _____ [famous] football player in the world.

• Messi is the most famous football player in the world.
• Messi is the more famous football player in the world.
• Messi is famouser football player in the world.
• Messi is most famous football player in the world.

Complete the sentence with the right option:
The Japanese diet is ____________________ than the American diet.

• healthier
• more healthy
• more healthier
• the more healthy

City is (busy)_______ than rural area.

• busier

• busys

• busiest

That's probably _____ ________ in the world. (big)

• the bigger

• the biggest

• bigger than

• biggest than