关于OG 4 的代词指代问题 再度呼唤NN解答~~~

feathsea8

Of all the vast tides of migration that have swept through history, maybe none is more concentrated as the wave that brought 12 million immigrants onto American shores in little more than three decades.


(A) maybe none is more concentrated as
(B) it may be that none is more concentrated as
(C) perhaps it is none that is more concentrated than
(D) maybe it is none that was more concentrated than
(E) perhaps none was more concentrated than
OG 对CD选项的解释中说，在本题中it 必须有所指代，这里不是强调句型么？强调句中的it 不是只是为了引出被强调的部分没有实意么？求解答呀求解答~~~~

feathsea8

up~

feathsea8

up~

feathsea8

各路大神早早地看到吧~持续UP~

feathsea8

再up!

feathsea8

坚持不懈地up!

feathsea8

up

feathsea8

up

feathsea8

up到底~

feathsea8

up~