The opening ceremony of Beijing 2008 Olympics is a great success, which is believed  ________ the Chinese splendid civilization.

A．having been displayed

B．to have displayed

C．to be displayed

D．displaying

煤矿企业对协查出的职业病患者，必须按国家规定及时给以治疗、疗养和调离有害作业岗位，并做好健康监护及职业病报告工作。