一道gre绿皮书填空题
Aslateas1891aspeakerassuredhisaudiencethatsinceprofitablefarmingwastheresultofnaturalabilityratherthan______,aneducationinagriculturewas______.
第一空选项:A.effortB.luckC.learning
第二空选项:D.uselessE.vitalF.intellectural
答案是CD.
想问第一空为什么选learning而不是effort