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　　答案解析如下：

　　61. While all states face similar industrial waste problems, the predominating industries and the regulatory environment of the states obviously determines the types and amounts of waste produced, as well as the cost of disposal.

　　(A) all states face similar industrial waste problems, the predominating industries and the regulatory environment of the states obviously determines

　　(B) each state faces a similar industrial waste problem, their predominant industries and regulatory environment obviously determine

　　(C) all states face a similar industrial waste problem; their predominating industries and regulatory environment obviously determines

　　(D) each state faces similar industrial waste problems, the predominant industries and the regulatory environment of each state obviously determines

　　(E) all states face similar industrial waste problems, the predominant industries and the regulatory environment of each state obviously determine

　　(A)all states face similar industrial waste problems, the predominating industries and the regulatory environment of the states obviously determines

　　【错误】 主谓一致：“determines”的主语是“the predominating industries and the regulatory environment”，主谓不一致。

　　(B)each state faces a similar industrial waste problem, their predominant industries and regulatory environment obviously determine

　　【错误】 代词指代：代词“their”本意上想指代“state”，但“state”是单数，因此无法指代。

　　(C)all states face a similar industrial waste problem; their predominating industries and regulatory environment obviously determines

　　【错误1】 主谓一致：见(A)。

　　【错误2】 代词指代：见(B)。

　　(D)each state faces similar industrial waste problems; the predominant industries and the regulatory environment of each state obviously determines

　　【错误】 主谓一致：见(A)。

　　(E)all states face similar industrial waste problems, the predominant industries and the regulatory environment of each state obviously determine

　　【正确】 “all states”和“face”保持了主谓一致，“the predominant industries and the regulatory environment of each state”和“determine”保持了主谓一致。而“while”正确地连接了前后两个主谓结构。

　　【最优解题思路推荐】

　　“the predominant industries and the regulatory environment”是一个复数的概念，无法连接“determines”，立即排除(A)、(C)和(D)。

　　(B)中代词“their”犯了“无法指代”的错误，立即排除。

　　因此选择(E)。

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(编辑：马荟)