In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

When Roald Amundsen first (1) ______ the South Pole in 1911, he could plant (2) ______ flag there whilst, back in (3) ______ Arctic, no explorer ever had the luxury (4) ______ his claim with a flag. If he did, it would (5) ______ end up floating away to Greenland, making it a totally useless exercise.