Rope or ox? The man in the prison asked a new comer why he was sent there. The new comer answered, “ I am out of luck, I think. A few days ago I was walking in the street when I saw a piece of dirty rope. I thought nobody wanted it so I picked it up and took it home.” “ But it is not against the law that a man picks up a piece of rope and take home!”“ I told you I had bad luck, didnt I?” the man sighed, “The trouble is that I didnt notice there was an ox at the other end of that rope.”在句子中起名词作用的