172. Before the Civil War, Harriet Tubman, herself an escaped slave, returned again and again to Maryland to guide other slaves along the Underground Railroad to freedom.fficeffice" />
(A) herself an escaped slave, returned again and again to Maryland to guide
(B) being an escaped slave herself, returned again and again to Maryland so as to guide
(C) an escaped slave herself, returned again and again to Maryland for guiding
(D) herself as an escaped slave, returned again and again to Maryland so as to be the guide of(A)
(E) who had been herself as an escaped slave, returned again and again to Maryland for the guiding of
答案是A,请问B加了being, 错在哪里?如果去掉being,后面的so as to和to有没有区别?另外,D为什么不对?
多谢!
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