sat 语法题.为什么不选b.而选dThe finest quality raw silk comes from the commonly domesticated silkworm,Bombyx mori,( it feeds) on the leaves of the mulberry tree.  (B) feeding  (D) which feeds

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sat语法题.为什么不选b.而选dThefinestqualityrawsilkcomesfromthecommonlydomesticatedsilkworm,Bombyxmori,(itfeeds

sat 语法题.为什么不选b.而选dThe finest quality raw silk comes from the commonly domesticated silkworm,Bombyx mori,( it feeds) on the leaves of the mulberry tree.  (B) feeding  (D) which feeds
sat 语法题.为什么不选b.而选d
The finest quality raw silk comes from the commonly domesticated silkworm,Bombyx mori,( it feeds) on the leaves of the mulberry tree.
  (B) feeding
  (D) which feeds

sat 语法题.为什么不选b.而选dThe finest quality raw silk comes from the commonly domesticated silkworm,Bombyx mori,( it feeds) on the leaves of the mulberry tree.  (B) feeding  (D) which feeds
feed on 意思是以.为食,which feeds on the leaves of mulberry tree.是非限制性定语从句,修饰silkworm,故选择D

首先feed可以主动表被动,但他还是要表达被动之意。而若用—ing,他强调的是主动,语意冲突

feeding动名词做补语,原则上应该紧跟Bombyx mori,不用逗号,所以选D