Justin Foster,     1     American high school student, went missing last Friday night. Police are puzzled about it and have stepped     2     their search for him. The incident     3     （receive）great interest so far due to reports of strange lights and alien visits. According to Kelly,     4     is Justin’s sister, a bright light appeared outside her window and a large spaceship was flying outside. She heard Justin     5    （shout） and then the UFO disappeared. She believes the aliens took him,     6     her parents said she was only dreaming. Some other people, like Mavis Wood, think Justin     7    （take）by the aliens. Because sometimes people make up such     8     （amaze）stories, the police think there is no hard     9    （evident）that aliens took Justin. Now the police     10     （look）into other possibilities.