单选题 Workers at this toy factory- had to suffer from ______ living and working conditions.
【正确答案】 B
【答案解析】该句意为:该玩具厂的工人不得不忍受恶劣的生活和工作条件。naive:幼稚的,天真的;nasty:恶劣的,糟糕的,不文明的;naughty:调皮的。