866.Tiny quantities of more than thirty rare gases, most of them industrial by-products, threaten to warm the Earth’s atmosphere even more rapidly than carbon dioxide during the next fifty years.
(A) to warm the Earth’s atmosphere even more rapidly than carbon dioxide during the next fifty years
(B) to warm the Earth’s atmosphere even more rapidly over the next fifty years than carbon dioxide will
(C) during the next fifty years to warm the Earth’s atmosphere even more rapidly than carbon dioxide
(D) a warming of the Earth’s atmosphere during the next fifty years even more rapid than carbon dioxide’s
(E) a warming of the Earth’s atmosphere even more rapid than carbon dioxide’s will be over the next fifty years the key:B
答案是B，可是为什么A不对？
问题一：“than”是考察平行并列结构，但是B选项中的后边是will将来时，而前边是现在时“threaten”
问题二：“ over the next fifty years”为什么写在than前边比写在than后边好
谢谢 作者: appleontree 时间: 2011-9-14 21:30
AB的主要区别是比较成分后面的部分是否补出了在这里是情态动词的will
举一个aeon版主的例子
I eat apple faster than you。含义为我吃苹果比吃你快（歧义）
I eat apple faster than you do。含义为我吃苹果比你（吃苹果）快
