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

问题补充：

of the land in that district covered with trees and grass.

A. two fifth; is

B. two fifths; are

C. two fifths; is

D. two fifths; are

答案：

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。