题目

Think about the last time you felt afraid．Was it a fear of height?Did you oversleep on a weekday and fear you’d get into trouble at the office?In any case，you know what it feels like to feel fear．     But one woman doesn’t．The woman，code-named“UM”，gave her first-ever interview after years of being studied by a team of researchers．The woman is given a code name because the researchers want to protect her from anyone who would take advantage of her inability to feel afraid．     UM can’t tell you what fear is because she’s never experienced it．“I wo