It is really a pity that I can not attend your wedding party this weekend. I _________ a very important international conference in Paris then.

A．have attended

B．are attending

C．have been attending

D．will be attending

中方国境站交出车辆外方检车员发现的铁路货车故障，在入境交接（）中无记录的，中方检车员代表应在外方形成的铁路货车存在技术状态不良的“记录”上签字。