根据网考网考试中心的统计分析,以下试题在2018/3/12日托业考试习题练习中,答错率较高,为:93%
【单选题】The Public Transport Commission's commitment to running our city's trains and buses as ______ as possible has reduced cost to the taxpayer by 5%.
A.efficient
B.efficiency
C.efficiently
D.efficiencies
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