of the land in Jia Xing No. 1 Middle School covered with trees and grass.A. Two third a

问题补充：

of the land in Jia Xing No. 1 Middle School covered with trees and grass.

A. Two third, are

B. Two thirds, are

C. Two third, is

D. Two thirds, is

答案：

A. Two third, are

B. Two thirds, are

C. Two third, is

(答案→)D. Two thirds, is

解析：考查主谓一致。分数和百分数+ of +名词做主语时，谓语动词取决于of后面的名词，三分之二应表达为Two thirds，of后面的名词为the land，所以谓语动词应用单数形式，故选D。