Answer:
I'm written with two letters, said with one and seen with two. What am I?
What is the word that even in plain sight remains hidden?
A large oasis in the desert. Come with cash and leave with none.
I am black white and read all over.
We are little airy creatures all of different voice and features one of us in glass is set. One of us you'll find in jet. Another you may see in tin. And the fourth a box within. If the fifth you should pursue it can never fly from you.
Why is the letter B always cool?