He _____ in a university for five years, but now he runs a company of his own.

A．has taught

B．had taught

C．taught

D．has been teaching

关于施工项目的确定时，描述不正确的是（）

A.施工项目划分的粗细程度，应根据进度计划的需要来决定

B.施工过程的划分要结合所选择的施工方案

C.区分直接施工与间接施工的区别

D.水、暖、电、卫和设备安装等专业必须细分具体内容