... sightings, views, scenes) 8- Meteors are called ________ stars. ( fall, fell, fallen, falling) 9- The shooting star ________ so fast that I can't see it clearly. ( appears, shows, sights, ... if people see a UFO, it ______ be a weather balloon or a meteor. ( must, would, might, should) 19- A farmer saw some aliens collecting soil ______.A- designs B- samples C- numbers D- amounts 20- ... flying saucers might be people’s __________. A- imaginative B- imagination C-imagine D- imaginary 29- He is a famous _________. A- science B- scientific C- scientist D- scientifically 30- The earth...