In the last few years thousands of films ________ all over the world.

A．have produced

B．have been produced

C．are producing

D．are being produced

归档的电子公文，应按本单位档案分类方案进行分类、整理，并拷贝至耐久性好的载体上，（）归档。

A.一式一套 

B.一式二套 

C.一式三套