Dear Mary,Thanks for your last letter.I will tell you something about me.There are four people in my family.My father is a doctor.He helped lots of patient.My mother is a teather.she is strict with her students,but they all like her.My sister is four years old.she is too young to go to school.She likes chicken very much and she hardly ever eats vegetables.As for me,I am a student.Write soon. Yours, David.李华想买一双鞋子:lihua wants to buy a pair of shoes.