急用.Two thirds of this area _______covered with forest,in whicth

题目

急用.Two thirds of this area _______covered with forest,in whicth
标准答案是A.可我觉得应该是B.为什么是A?Two thirds作主语,谓语应该用复数吧.而whicth_所指代的是forest,谓语应该用单数吧.

答案

几分之几 + of + 名词：谓语动词的单复数取决于该名词.Two thirds of this apple is green.(apple 是单数,谓语动词用单数)Two thirds of the water is on the table.(water 是不可数名词,谓语动词用单数)Two thirds ...