... 39- If there were flying saucers, there would be _ of their landing ( marks, spots, traces, prints) ... cold The (4) _ goes down to 151 ºC below zero But during the day the temperature rises to 100 ºC above zero There are great round (5) on the moon They look like big lakes They are ... for you to answer yourself C- WORD FORM: Many people believe in the _ of UFOs (exist) In 197 8, a pilot’s shocked the world (appear) Astronauts must be in an condition (excel)...