求解，07版PREP2-Q58，NN们来帮帮我

evelyn205205

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！！！

evelyn205205

求助！！！

perain

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.

chenjiao0121

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

evelyn205205

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

-- by 会员 chenjiao0121 (2011/6/30 17:49:57)

谢谢你为我拨开这题目的真实意图~