题目内容：

it's her very cleverness _makes it difficut for her to work with others.
A what B for what C which D that
请大家帮你忙说说这是为什么.

优质解答

选D.that
去掉 it's ...that .还是完整的句子,因此可以判断是强调句.
正是她过人的聪慧,才使得她很难和别人一起共事.