GWD 1-16

不知道这种发问标题对不对？刚才怎么search都没找到以前的帖子啊。

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

不明白为什么选B不选A??

than it was: "it was" is not right

1. costs --> they

2. accounted (V) --> did  or had

有道理。可是那 than 后边什么都没有不是很别扭吗？总得有个比较的对象吧？