Why has Australia always been a continent with few people?（）
Because Australia is too far away from Europe.
Because Australia is the least mountainous and most level of the world’s continents.
Because Australia is separated from the rest of the world by seas.
Because most of the continent is hot and dry.
澳大利亚大陆几乎没有人是因为大陆的大部分地区都是又热又干。
