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Q41P-SC46

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

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.

E.  
would
soar to a level more than one-third higher than they were

OG里频繁出现,典型的if X happens,Y will happen形式啊

1)if x happens, then y will happen, 2)y will happen unless x happens first 3)y will happen only if x happens first 一共三种, 所以CDE出局, than前面单数,所以those出局, b is right

比较 2010的 level 和 1990年的

我觉得will和would在这里都可以用，至少是在语法方面，在没确定句子明确意思前（没有上下文，无法完全判断句子的准确态度，比如看这个句子的时候时间已经到了2025年，那么这可能就是个对过去的让步也没准）。虚拟语气不是这题的考点，这题考比较结构中的代词指代问题，句中soar to a level more than one-third higher than是2010年的level和1990年的level比，也就是名词跟名词比，而且level是单数，所有复数形式的代词都可以一步剔除掉，ADE随即排除。C选项中it was是一句话，无法跟a level比较，将it的指代对象（a level）带进去：a level was in 1990，是不是不通啊。所以选B：soar to a level more than one-third higher than that（a level) in 1990

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