A fifteen­-year-­old boy named Justin Foster in Dover，New Hampshire went  81  two days ago. It was not until the lunch time the next day that he was found missing. His parents became  82  and called the police immediately. 83  said they saw Justin walking towards his home at 10：45 p．m. And 84  to Kelly，Justinˈs sister，he returned home the night before and she even heard him put on his favourite CD，and just then she happened to see a large  85  flying outside，so she thought Justin must have been taken away by  86  .Some people  87  her ideas，saying they themselves experienced this kind of  88__ things .Police were stepping up their search for the  89  such as UFOs，murder and so on，and they said they wouldnˈt give up until they find  90  evidence.