问题补充:
The purpose of the research had a more important meaning for them than.
A. ours
B. those of ours
C. it had for ours
D. it did for us
答案:
A. ours
B. those of ours
C. it had for ours
(答案→)D. it did for us
解析:这题考查指代的用法,it代指The purpose of the research,did代指had a more important meaning,句意是:这项调查的目的对他们比对我们的意义更重大。选D。