If current trends continue, by the year 2010 carbon emissions in the United States will soar to a level more than one-third higher than were those in 1990, according to official projections.
(A) will soar to a level more than one-third higher than were those (B) will soar to a level more than one-third higher than that
(C) would soar to a level more than one-third higher than it was
(D) would soar to a level more than one-third higher than those
(E) would soar to a level more than one-third higher than they were
答案是B。 我选的是C。 不是有一个语法是by the time when，后面应该采取的过去时么。 例如by the time when she was 12，she had done sth. by the time of 未来的时间，则后面是主语+would+动词原形么？
期待NN们的帮助啊，不胜感激！！！
作者: evelyn205205 时间: 2011-6-30 16:05
求助！！！作者: perain 时间: 2011-6-30 17:16
If current trends continue, 这句话很关键，表明了推测不是发生在过去的，所以不用would。
如manhattan中提到的一个例句： IF Sophie EATS pizza tomorrow, THEN she WILL BECOME ill. IF Present, THEN Future.作者: chenjiao0121 时间: 2011-6-30 17:49
一：观察了下，似乎题目中考察will和would区别的题目很少。所以建议别从这考虑。 二：时态的确定请根据意思来，句中说的2010还不到，所以是对未来情况的说明，用一般将来时正确。 三：这道题的考点其实是比较。关键在看清是谁和谁比。应该是 a level ...than(| ) ,所以应该选that。所以选B作者: evelyn205205 时间: 2011-6-30 21:23
一：观察了下，似乎题目中考察will和would区别的题目很少。所以建议别从这考虑。 二：时态的确定请根据意思来，句中说的2010还不到，所以是对未来情况的说明，用一般将来时正确。 三：这道题的考点其实是比较。关键在看清是谁和谁比。应该是 a level ...than(| ) ,所以应该选that。所以选B