In the 1980’s the rate of increase of the minority population of the United States was nearly twice as fast aS the 1970’s. (A)twice as fast as (B)twice as fast as it was in (C)twice what it Was in (D)two times faster than that of (E)two times greater than 答案是C。 what引导的从句,what本身在从句中充当一 定的成分。刘继民说it 指the rate of increase,那么what指什么呢?该怎么理解"what it was"这个表达? 谢谢。