It’s an old photo of my childhood that I when I was looking for my ID card the other day.

问题补充：

It’s an old photo of my childhood that I when I was looking for my ID card the other day.

A came into

B came about

C came across

D came out

答案：

解析：考查短语辨析。came into 进入，came about 产生，came across 偶然遇见，偶然发现，came out 开花。出版，句意：前几天当我在找我的身份证的时候，我偶然发现了我童年时代的一张旧照片。所以选C。