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

问题补充：

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

A. Two fifths；is

B. Two fifth；are

C. Two fifth；is

D. Two fifths；are

答案：

(答案→)A. Two fifths；is

B. Two fifth；are

C. Two fifth；is

D. Two fifths；are

解析：本题的主语是land，为不可数名词，之后的be动词应该用is，分数的表示法为基数词+序数词，当基数词大于1时，序数词应使用副词，故本题选A。