of the land in that district covered with trees and grass. A. Two fifths; isB. Two fifth

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(答案→)A. Two fifths; is
B. Two fifth; are
C. Two fifth; is
D. Two fifths ; are
解析：考查主谓一致和分数表达法。当分子大于等于二的时候，分母的序数词使用复数形式，根据这一点排除BC。分数百分数做主语的时候，如果后面的名词是不可数名词，谓语动词用单数，如果后面的名词是可数名词复数形式，谓语动词用复数。故A正确。