The ..... could hardly see the airstrip because of the heavy fog in the atmosphere. Luckily, the fog lifted as he got closer to the ground below. (*) pilot (*) pilots' (*) pilot's (*) pilots
This is a companion discussion topic for the original entry at https://english.best/questions/21647,the-___-could-hardly-see-the-airstrip-because-of-the-heavy-fog-in-the-atmosphere-luckily-the-fog-lifted-as-he-got-closer-to-the-ground-below/