著名的京剧传统剧目《捉放曹》是根据《三国演义》的情节改编的。下面是京剧中陈宫唱词：“我先前自道他（曹操）宽宏量大，却原来贼是个无义的冤家，马行在狭道内我难以回马。”陈宫为何骂曹操“无义”？“狭道内难以回马”又为何事？请简要叙述《三国演义》相关的情节。

Einstein liked Bose's paper so much that he ________ his own work and translated it into German. [ ]

A. gave off

B. turned down    

C. took over    

D. set aside