George and Lucy got married last Sunday. All their friends __________ to their wedding (婚礼).

A．invited

B．were inviting

C．have invited

D．were invited

美国失业保险的法律依据是1935年颁布的《社会保障法》，属于：（）。

A、自愿性失业保险

B、强制性失业保险

C、分散性失业保险

D、协调性失业保险