用五十词英语描述我的妹妹，叫丹丹，7岁，长着一张圆圆的脸蛋，长长的头发，是个很开朗的女孩。

This is my little sister whose name is Dandan . She is seven years old. She has a round face with long hair. She is very outgoing. Sometimes she reads picture books and story books. When she meets somebody she always says hi to them with a smile. She is m