Thanks to the economical development, workers' wages have increased ________ as far as 200% in the recent three years.

A．forB．toC．upD．by

D

解析試題分析：考查介詞辨析。本題中的介詞to表示增加的結(jié)果；by表示增加的程度；句意：多虧了經(jīng)濟(jì)的發(fā)展，在最近三年工人的工資增加了百分之200.故D正確。
考點(diǎn)：考查介詞辨析
點(diǎn)評(píng)：本題中的兩個(gè)介詞to和by經(jīng)常和動(dòng)詞increase或者reduce連用，表示增加或者減少的程度。對于這些較為特殊的用法，在平時(shí)要多加注意，既要注意普遍性也要注意特殊性。

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