【答案解析】事实细节题。文中第三段对该题所问有明确的答复：Present flying routes will be completely changed，for the Antarctic refueling bases will make flights from Australia to South America comparatively easy over the 5，000 miles journey．在南极建立机场，地面站，进行洲际通航是人类计划做或正在做的事情。故D项为正确答案。