单选题 Though my aunt pursued a policy, ______, in those days, enlightened, she never allowed her domestic staff to work more than eight hours a day, ______ she was extremely difficult to please.
【正确答案】 B
【答案解析】[解析] 本题测试从句中连接词的用法。第一个空格处应当是一个引导非限制性定语从句的连接词，这样可以排除A，D两个选项。第二个空格处前后两部分之间的关系应当是一个因果关系，B选项中“in that”可以用来作为引导原因状语从句的连接词，所以B选项是正确答案。