问一道GWD －TN22的语法

chicago328

Q41P-SC46

If current trends continue, by the year 2010 carbon emissions in the United Stateswill 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 is 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

我是选的B，但是我不知道A的were those错在那里？谁给解释一下？谢谢！！！

kathy1989717

比较对象是a level,应该用单数。。。。 were those是复数

tracyforever

"will soar to a level more than one-third higher than were those"

我不理解为什么要用were those, 这个应该是more than one-third higher than the level in 1990，然后用代词that代替the level,因为是单数，所以用的是that而非those...