I think three fourths_of the materials llistened to at the beginning of the exam___are_easy.
nearly three fourths of the earth ___is conered by sea
为什么一个用are 一个用is
人气:173 ℃ 时间:2020-06-10 05:46:05
解答
看of 后面词是可数名词还是不可数,如果是可数,像materials,谓语动词就要用复数.如果是不可数,像earth,就用单数.
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