English Language · Fill in the Blanks

Choose the pair of words that logically completes both sentences. I. The advanced telescope, which has been ________ the star cluster for three years, will end its mission by making a final ________ into the dense gaseous clouds of the nebula. II. For spectators more accustomed to ________ the competition from the stands, the athlete's sudden ________ into the freezing pool was the highlight of the event.