I regret ________ that you have failed the exam, but what you should do now is not to regret ______ so much time but to seize every moment from now on.

A．to inform; wasting

B．informing; to waste

C．to inform; to waste

D．informing; wasting

定期地举行交流座谈会，由每个项目小组或职能部门轮流向其他项日成员介绍本领域的基本技能和最新知识，这是运用了横向界面协商合作准则中的< )方法。

A．跨职能整合

B．充分沟通

C．充实等级

D．合作