so or too

This room is ___ dark that I cannot find the light switch

• so

• too

• very

I think it is ___ hot today to play baseball.

• so

• too

• very

I am ___ sure that I passed the exam that I am not going to wait for the results to be announced.

• too

• very

• so

That sweater is ___ small that I cannot wear it

• so

• very

• too

Yesterday I was ___ tired to go to work

• too

• so

• very

I was ___ tired afterwards that I went home to have a nap

• very

• too

• so

You are never ___ old to learn something new

• too

• so

• very

Yes, but it's ___ old to be worth very much money

• very

• too

• so

Well, I'm not sure. It's __ old that it might be a collector's item soon

• very

• so

• too

Then it wouldn't be ___ good an idea to sell it now, would it?

• so

• very

• too