GWD1-Q16？句子补充完整？

coffeeqoo

GWD1-Q16:

Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion than it was in any previous election.



A.
a greater proportion than it was

B.
a greater proportion than

C.
a greater proportion than they have been

D.
which is greater than was so


      E    which is greater than it has been
答案是B，想问下各位NN，B补充完整是什么样子的？

bull11389

我认为是主语比较

than television costs accounted for the spending in any previous election.

这样应该更清楚
Soaring television costs accounted for a greater proportion in the presidential campaign of 1992 than television costs  accounted for the spending in any previous election.

open to discuss

SDty8

这道题我觉得还是很奇怪，我认为选A

fybtgn

这道题我也不是很清楚 xdf老师说比较的后半段要用that these 不能it they them，PREP2里面就有后半段用it然后对了的

求nn指点

bobdog179

自己和自己比才用代词they，it
To develop more accuratepopulation forecasts, demographers would have to know a great deal more than they do now about the socialand economic (GWD-1-Q32)
而这题：
Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion than it was in any previous election
it精确指代了1992那批电视，1992的东西在任何以前。。。不对。应该改为that。
that those指代同类事物，而不是前面提到的相同事物·