He then drew out of a pile of papers with name and dates which could 20 years ago.
A. marked; date from
B. marked; be dated back from
C. marking; date up to
D. marking; date from
网友回答
(答案→)A. marked; date from
B. marked; be dated back from
C. marking; date up to
D. marking; date from
解析：句意：然后他拿出一堆标注上名字和日期的文件这些要追溯到20年前。第一空填marked，因为be marked with“被标注有…”,这里是过去分词做定语，第二空填date from或date back to“追溯到”，所以选A。