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.
这道题应该选什么啊, 为什么??
lz发帖前最好搜索以下别人的讨论,不过偶还是再解释一下:
1)it was虽然只有两个词,但均不对,it指代错误,was无所指代,只能用did;
2)省略,不会造成歧义,correct;
3)时态错误;
4)which指代错误;
5)时态,代词,以及which都是错误的;
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