Answer:
What gets closer when you blink?
As soft as silk, as white as milk, as bitter as gall, a thick green wall, and a green coat covers me all.
It doesn't live within a house, nor does it live without. Most will use it when they come in, and again when they go out.
A woman shoots her husband, then holds him under water for five minutes. Finally, she hangs him. Five minutes later they enjoy a wonderful dinner together. How can this be?
Sometimes black, sometimes white, I have veins but no blood
What never gets any wetter no matter how hard it rains?