–Who is that little boy in the photo Oscar?–Oh it’s me! It when I was five years old. A

问题补充：

–Who is that little boy in the photo, Oscar?

–Oh, it’s me! It when I was five years old.

A. was taken B. took C. was taking

答案：

解析： 本题的时间状语从句是过去时，故主句也用过去时的一种，本题的含义是我5岁的是时候拍了一些照片，表示被动的意思，故用被动结构be+过去分词，故本题选A。