When I finished the story, Lenin jumped up from his chair and started pacing the floor, ______, deep in thought.A.with his head bendingB.in his head bentC.his head bendingD.his head bent
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D解析语法结构题。本句的难点是：his head bent是独立结构，his head是逻辑主语，bent是逻辑谓语。本句的意思是：我讲完故事后，列宁从椅子上跳了起来，开始在屋千里踱来踱去，低着头，陷入沉思。