Not only ____ strict with us, but also ____ for us.

A．was the teacher; did he care

B．was the teacher; he cared

C．the teacher was; did he care

D．the teacher was; he cared

教学员之间有效交流的标准是（）

A、所传递的思想和被接受的思想的相似性

B、畅谈和动态元件间的关系

C、动态程度，相互关联的原理