I am too busy now. If I____ free, I ____to the cinema with you.

A．am; will go

B．am; would go

C．were; would go

D．was; was going

在PremierePro软件中，能够改变素材本身颜色、尺寸、风格等要素工作的是（）。

A.视频运动特效

B.视频转场特效

C.视频的剪辑

D.视频滤镜