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.
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.
Awill soar to a level more than one-third higher than were those 分析A选项
Bwill soar to a level more than one-third higher than that 分析B选项
Cwould soar to a level more than one-third higher than it was 分析C选项
Dwould soar to a level more than one-third higher than those 分析D选项
Ewould soar to a level more than one-third higher than they were 分析E选项