是英语高手的进来下

I am on duty today Everyone is here.let me tell you a story.I have a friend .He likes drinking.One day at 12 p.m.I saw him on the floor of a pub(小酒馆)。"What are you doing here?" "I'm looking for my watch.I"
"Where did you lose(丢)it?" "On the street." "But why are you looking it here?" He thought for a moment and said,"The light here is better."

What did my friend lose?
Where did he lose it?
Where did he look for it?
Why?