Answer:
I open wide and tight I shut, Sharp am I and paper-cut fingers too, so do take care, I'm good and bad, so best beware.
There are two bodies on the floor. They are surrounded by water and broken glass. How did they die?
We are five little objects of an everyday sort. You will find us all in a tennis court.
What gets closer when you blink?
It's been around for millions of years, but is never more than a month old. What is it?
You use it between your head and your toes, the more it works the thinner it grows.