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
答案是B,为什么B好过C呢?
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