有两个比较题，我搞不太明白，是关于it的指代，一个是不可以用的，一个是可以的，有点糊涂，题目如下：
1，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 (B) E. which is greater than it has been
答案是B，为什么不能是A呢，A里的It可以指代proportion吗？
2，Between 1990 and 2000 the global economy grew more than it did during the 10,000 years from the beginning of agriculture to 1950. A. Between 1990 and 2000 the global economy grew more than it did during the 10,000 years from the beginning of agriculture B. Between 1990 and 2000 the growth of the global economy was more than that during 10,000 years, from when agriculture began C. The growth of the global economy between 1990 and 2000 exceeds that which had been for 10,000 years from the beginning of agriculture D. The growth of the global economy between 1990 and 2000 exceeds what it has been for 10,000 years, from when agriculture began (A) E. The growth of the global economy between 1990 and 2000 exceeded what it did for the 10,000 years from the beginning of agriculture
这题答案是A，it指代global economy
为什么一个可以用it，一个不可以用it啊
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发表于 2013-11-16 14:58:54
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