题目:
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.
选项:
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:
B