6) Corn originated in the New World and thus was not known in Europe until Columbus found it ____ in Cuba. 　　 A) being cultivated B) been cultivated C)shavingscultivated D) cultivating

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選 A being cultivated corn 玉米谷類 是 被 耕種。需要用表示被動(dòng)含義的結(jié)構(gòu)。C(having cultivated) D 均不表示被動(dòng)。不可選。B been cultivated 本身不符合語法結(jié)構(gòu)。英語中沒有 find sth been + ed分詞 的表達(dá)。A being cultivated 是正確的結(jié)構(gòu)與表達(dá)。