Answer:
What body part is pronounced as one letter, but written with three, only two different letters are used?
I am a room that has a roof but no walls. What am I?
I am a rock group with four members all of whom died in plane crashes. Who am I?
When you buy me I am costly, but the only use I have is hanging only. What am I?
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
What did the piece of wood say when he saw the screwdriver and screws approaching?