阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。

    I have two good friends. They are Peter and Gina. Here are two photos. The first one is a photo of Peter's family, and the next one is a photo of Gina's room. In the first photo, you can see four people （人）. They are Peter's parents, Peter and his sister. Peter's father is a teacher. And his mother is a teacher, too. Can you see the boy on the bed? He's Peter. A red hat is on his head. Who is the girl? Oh, she is Peter's sister. Her name is Nancy. In the next photo, you can see a tidy room. It's Gina's room. A blue desk, a yellow chair, a green bookcase and a white bed are in it. A computer and some CDs are on the desk. Her red schoolbag is on the chair. A dictionary is in the bookcase. Gina's room is very clean and tidy.