还有2道of 987

763     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（D）

(E) a significance even greater for the economy than have

是THAN后面要用DO替代实意动词么？

774     The lawyer for the defense charged that she suspected the police of having illegally taped her confidential conversations with her client and then used the information obtained to find evidence supporting their murder charges.

(A) used the information obtained to find evidence supporting

(B) used such information as they obtained to find evidence supporting

(C) used the information they had obtained to find evidence that would support

(D) of using the information they had obtained to find evidence that would support（D）

(E) of using such information as they obtained to find evidence that would be supportive of

这道题考的什么语法点啊？

763 是的，我认为do代替have。

774主要是平行of having and of using , 另外support用动词形式。

c为什么不对呢??前面是have,后面也应该是have才对,请解释清楚一点