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

采用剪力墙结构的建筑物其竖向荷载的传递路线是( )。

A．楼板—剪力墙—基础

B．楼板—梁—柱—基础

C．楼板—柱—剪力墙—基础

D．剪力墙—楼板—柱—基础