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

问题补充：

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

A. Two-five ; is

B. Two-fifth ; are

C. Two-fifths ; is

D. Two-fifths ; are

答案：

A. Two-five ; is

B. Two-fifth ; are

(答案→)C. Two-fifths ; is

D. Two-fifths ; are

解析：句意：在该区的五分之二的土地覆盖着树和草。英语中的分数，分子用基数词，分母用序数词，当分子大于一时分母要用复数形式；land不可数，所以选C。