You are too late. The film ______ since half an hour ago.

A．has begun

B．has been on

C．began

D．begins

不属于促进慢性肾炎恶化因素的是

A．高脂血症

B．遗传因素

C．高血压

D．高蛋白饮食

E．肾脏基础病变活动