标题: 新东方补充教材section11,第6题 [打印本页] 作者: gustav 时间: 2005-12-29 17:32 标题: 新东方补充教材section11,第6题
6. The guiding principles of the tax plan released by the Treasury Department could have （even a greater significance for the economy than） the particulars of the plan.
(A) even a greater significance for the economy than (B) a significance that is even greater for the economy than (C) even greater significance for the economy than have (D) even greater significance for the economy than do (E) a significance even greater for the economy than have
答案是D，想问than后面助动词补出为什么不是could或者是have，而是do?
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