Employment costs rose 2.8 percent in the 12 months that ended in September, slightly less than they did in the year that ended in the previous quarter.
Employment costs rose 2.8 percent in the 12 months that ended in September, slightly less than they did in the year that ended in the previous quarter.
A.less than they did
B.less than it did
C.less than they were
D.lower than
E.lower than they were 给的答案是A,可是语法笔记上不是说they,it在比较句中有指代错误的嫌疑吗?谢谢指教!还有用rise的时候是不是一定要用less?