【正确答案】 1、brought back to them the days when they were in Beijing    

【答案解析】[考点] ① bring...back to sb. 表示“使某人回忆起……”；② 定语从句：the days when they were in Beijing表示“在北京的日子”；③ “使某人回忆起……”还可用remind sb. of...表示。