2.       Of ail 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

选E？

2. 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

Idiom + Verb form

This sentence depends on the comparative structure x is more than y. Here, an idiomatically incorrect construction x (none) is more as y (the wave) is used. In addition, the second part of the sentence uses the past tense verb brought, indication that the event is over. The verb used in the comparative construction must also be past tense, x (none) was more concentrated than y (the wave). Maybe and perhaps are interchangeable; perhaps is slightly more formal.

A  In correct idiom is used for comparison; is concentrated is the wrong tense

B  In correct idiom is used for comparison; it may be that is wordy

C  It is none that is more… is a wordy and ungrammatical construction

D  It is none that is more… is a wordy and ungrammatical construction

E  Correct. The correct comparative construction is used in this sentence; the verb is past tense.

The correct answer is E.

Thank you, Corolhide, again

perhaps > maybe, 在正式的书面语中只能用perhaps

C it is none that was 的形式不简洁，原文可以直接用none was

有一个问题，问一下大牛们，那个of all the vast tides of migration 放在句首是其什么作用呢？？？

是不是介词修饰提前呢？？？？

2. 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.
(E)
            perhaps none was more concentrated than  --> perhaps none is more concentrated than

还是没有搞清楚这里的时态为什么是一般过去时。