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题库 / Prep2007E2-SC-58
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.
will soar to a level more than one-third higher than were those
will soar to a level more than one-third higher than that
would soar to a level more than one-third higher than it was
would soar to a level more than one-third higher than those
would soar to a level more than one-third higher than they were
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此题是道简单的题目，前后比较的对象是level，而不是carbon emissions。以后做题要保持认真、细心、严谨的态度，这是改进的地方。
Now A is wrong as those can to refer carbon emissions or current trends that is illogical ; B is correct captures the meaning " that refers to a level"
现在时态 后面虚拟will
B选项的that不应该是复数吗？
D选项的would时态为什么不行呢？主将从现？
1. 指代level。
2. 是的。如果从句是过去时，主句会用would。
那老师，请问这个和虚拟语气有关系吗？还是纯粹的主将从现？
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