The unemployment rate has decreased _____ 2% to 5.4%, compared with 7.4 % last year.

A. by B. from C. with D. on

A

【解析】

試題分析:句意：失業(yè)率與去年的7.4%相比，已經(jīng)到了5.4%，下降了2%。從句意可知此處指失業(yè)率下降了，by可以指相差的程度，選A。

考點(diǎn)：考查介詞用法

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