A report by the American Academy for the Advancement of Science has concluded that much of the currently uncontrolled dioxins to which North Americans are exposed comes from the incineration of wastes.
much of the currently uncontrolled dioxins to which North Americans are exposed comes
much of the currently uncontrolled dioxins that North Americans are exposed to come
much of the dioxins that are currently uncontrolled and that North Americans are exposed to comes
many of the dioxins that are currently uncontrolled and North Americans are exposed to come
many of the currently uncontrolled dioxins to which North Americans are exposed come
首先,dioxins为以s结尾的规则变化的复数名词,所以在DE中比较,E中副词currently在形容词前不会产生歧义,同时介词短语be exposed to do暴漏在。。。中也使用正确;而D中and 前后的并列成分不平行