Logic Riddles

Question: What is green, fuzzy, has four legs and if it fell out of a tree could kill you?

Question: Flies hate us with a passion, who are we?

Question: Which tool doesn't have a licence, but drives.

Question: You are walking down a dark alley at night. Suddenly, a man jumps out of the shadows with a gun. He tells you "I am here to kill you. Tell me one wish. I will not fulfill it, but I will kill you. If you say the right thing, you will be saved." What do you say?

Question: Have a question , regardless you ask any people , that people only give you answer is " no " , what is this question ??