— When can I get my car back?

— I think it ________ sometime later today. Give me a call around 3 o'clock.[ ]

A. will be finished  

B. finishes

C. will finish  

D. will be finishing

“查找边缘”滤镜主要用来搜索颜色像素对比度变化剧烈的（），将高反差区变成亮色，低反差区变成暗色，其它区域则介于两者之间，硬边变为线条，而柔边变粗，形成一个厚实的轮廓。

A.边缘

B.反差

C.边界

D.线条