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题库 / Prep2008E2-SC-197
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 greater proportion than it was
a greater proportion than
a greater proportion than they have been
which is greater than was so
which is greater than it has been
请看讲解视频
1.which修饰对象错误，DE错
2.代词指代，it和they的指代都不明确，而且不正确。
这里是比较和省略结合，把比较的名词省略掉。
a greater proportion than（the proportion）（television costs had accounted for of the spending）in any previous election
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