What is the opposite of "modern"?

What do you measure with a thermometer?

Water in this river is not clean. It is .........................

The ..................................... temperature of Earth is 15°C.

Michael Jordan .............................. from basketball in 2003.

I can't carry this box. It is too ...........................

King cobras are the ............................... venomous snakes in the world.

We have to fly for 20 hours from Athens to ....................................... Australia.

My father has a computer company and he .............................. it himself.

Sharks are very clever when they hunt their ......................