猪头小妹,你补出的的“they had been”不对,上面47楼(对不起我不会引用)才是正解 句子补全应该是Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion than (it had been)in any previous election. it指代 proportion (引自47楼) 我对所有讨论的总结,有几下几个 1、than 后面,如有代词指代,应该是指代 Proportion 而不是costs 2、如果指代 proportion, 代词用单数是对的(不知道为什么,没有大虾说起,我个人以为,因为后面用any,意思是任何一年,所以单数是对的) 3、如果指代 proportion, 助动词用 be 也是对的 4、A 的问题在于 was 的时态,而B,因为省略了(大虾们认为省略的问题不如时态错误严重吧),所以B对 |