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

问题补充：

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

A. Two fifth; is

B. Two fifths; is

C. Two fifth; are

D. Two fifths; are

答案：

A. Two fifth; is

(答案→)B. Two fifths; is

C. Two fifth; are

D. Two fifths; are

解析：考查主谓一致。分数或百分数+名词做主语时，谓语要和of后面的名词保持一致，题中the land为不可数名词，故谓语用单数形式，Two fifths五分之二，故选B。