12月23日 留学群liuxuequn.com英语频道特为大家准备相关的学习资料，希望对大家有用。 hello, everyone, i’m liu dongdong. i’m a student. there are three people in my family—my father, mother and i. my father is 40 years old. he is a worker. i think he is a good worker. because he work...