Fill in the Blanks (Reading & Writing)

Before automation, lighthouse keeping demanded constant vigilance, as keepers had to —keepkeptkeepingkeeps the lamp burning through storms and long winter nights. Many stations were built on —isolatedisolatingisolationisolate rocks far from shore, making supply visits infrequent and dangerous. Keepers kept meticulous logs of passing ships and weather conditions, a task that required both —disciplinedisciplineddisciplinarydiscipling and a tolerance for —prolongedprolongprolongingbrief isolation.