it is because .that...用法是什么

问题描述:

it is because .that...用法是什么
或者说根本没有

It is beacuse I was late for school again this morning that my teacher is angry now.
这应该是一个强调句.It is + 被强调部分 + that .+其他...because用that 替代喃?只看到用两个that的