65806：it has also been proved by scientific research that children wo often eat fish can be cleverer

题目

65806：it has also been proved by scientific research that children wo often eat fish can be cleverer.
想知道：taht引导的是什么从句?

答案

主语从句,作主语.it为形式主语.
谓语是 has also been proved
经常吃鱼的孩子可能更聪明,这一点已被科学研究证实.