问题
选择题
Two-thirds of the land ________ covered with green grass and the rest _______ covered with pine trees.
A．is; is
B．is; are
C．are; is
D．are; are
答案
答案：A
考察主谓一致。分数(百分数)+of+名词”结构作主语时，谓语动词的数与其中名词的数保持一致。Land为不可数名词，故后面用is。The Rest指代land的一部分，故谓语动词还是用is，选A。