求助：OG11-69 关于从句结构问题

xpmayc

69. 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.

(A)         much of the currently uncontrolled dioxins to which North Americans are exposed comes

(B)         much of the currently uncontrolled dioxins that North Americans are exposed to come

(C)        much of the dioxins that are currently uncontrolled and that North Americans are exposed to comes

(D)        many of the dioxins that are currently uncontrolled and North Americans are exposed to come

(E)         many of the currently uncontrolled dioxins to which North Americans are exposed come

A report by the American
    Academy for the Advancement of Science has concluded 是一个完整句子，但是在that 后面根据答案E， 句子不是不完整吗？

that many of the currently uncontrolled dioxins (主语） to which North Americans are exposed come
  from the incineration of wastes. 

请问：谓语在哪里啊？这是不是句子啊？

[此贴子已经被作者于2008-9-14 22:50:10编辑过]

NKspielberg

that从句： many of the currently uncontrolled dioxins to which North Americans are exposed come from the incineration of wastes.

come from 是谓语