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
这一题,麻烦大家帮帮忙啊~~
A中补出的话应该补出it does,因为文中用的costs.
这样理解对不对?
比较结构的省略形式,主语和谓语都一致所以省掉了
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