“以和为贵”、“和平交往”是中华民族的优良传统，在古代对外开放中体现这一优良传统的是（     ）

①张骞通西域               ②鉴真东渡 

③郑和下西洋               ④玄奘西游

    My name is Tom. I come from England. I like to have friends who are different from me. My best friend is Paul. Paul is funnier, more outgoing and athletic than me. He always tells jokes and makes me laugh. We also like different things. He likes going to the movies. He likes playing sports. He likes pop music. But I like reading books. He often asks me to go to the movies and gives me some interesting books. And I often give him CDs. We often help each other.