问题描述：
主谓一致：every+单数名词+单数谓语.
题：Every business needs to evaluate its strength and weakness periodically (need的单数形式是 needs?
2,our professor __the fina research papers to be submitted before May 18.答案是expects..句子主语our professor是单数,那么expects是单数形式?
题：Every business needs to evaluate its strength and weakness periodically (need的单数形式是 needs?
2,our professor __the fina research papers to be submitted before May 18.答案是expects..句子主语our professor是单数,那么expects是单数形式?
问题解答：
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