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

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A. two fifth; is
B. two fifths; are
(答案→)C. two fifths; is
D. two fifths; are
解析：考查分数的表达法，分子基数词，分母序数词，分子超过一，分母加s。分数做主语，此处代表不可数名词land ，故用单数。