1. yep, of all做状语。
2. 其实本句有省略,还原之后是:
perhaps none was more concentrated than (was) the wave that brought 12 million immigrants onto American shores in little more than three decades.
被省略的was是由brought决定的,因为要保持时态一致,而这个was能够省略是因为跟前面none was中的was一致才省略的。
所以前面要用was。
-- by 会员 aeoluseros (2010/8/24 13:17:23)