问个很傻的比较问题

atiger882003 · 发表于 2010-11-27 08:27:43

Employment costs rose 2.8 percent in the12 months that ended in September, slightly less than they did in the year that ended in theprevious quarter.

(A) less than they did

(B) less than it did

(C) less than they were

(D) lower than

(E) lower than they were

答案是A，为什么这里不是C？

还有。在这种情况下区别less 和 lower的区别吗？

sdcar2010 · 发表于 2010-11-27 09:53:02

rose --> did

not much difference.

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