1. John Smith provides information on the conditions that lead women to a gynecologist, and he notes that these conditions can, and sometimes are, used in the promotion of surgery which is not needed.
(A) and he notes that these conditions can, and sometimes are, used in the promotion of surgery which is not needed
(B) noting that these conditions can be, and sometimes are, used to promote needless surgery
(C) and notes that they could and sometimes are used unnecessarily in promoting surgery
(D) sometimes promoting needless surgery
(E) which they use sometimes to promote unnecessary surgery
请各位讲解下这道题，看不懂B阿谢谢
b主要是是在can后面补了个be,才可以be used啊。
noting that应该是做主语的动作伴随状语。
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