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
a greater proportion than (the porportion television costs accounted for ) in any previous election
要比较的话,是 名词proportion和名词proportion之间的比较,因此 it was, they have been无法指代省略的内容
a greater proportion 实际上是 half the spending 的同位语 ,你把它替换进去
soaring television costs accounted for a greater proportion in the presidential campaign of 1922 than (**** costs accounted for the proportion ) in any previous election.
按这个结构的话,it 指代的是costs , was 也就不对了
这题重点在于 a greater proportion 实际上是句子宾语的同位语,就是说它做宾语,又怎么能 was呢