Tóm tắt cuộc hội thoại sau : Nick: Hi Mi, welcome to our house! Elena: Come upstairs! Ill show you my room. Mi: Wow! You have so many dolls. Elena: Yes. My hobby is collecting dolls. Do you have a hobby? Mi: I like collecting glass bottles. Elena: Really? Thats very unusual. Is it expensive? Mi: Not at all, I just keep the bottles after we use them. What about doll collecting? Is it expensive? Elena: I guess so, but all of my dolls are presents. My parents, and my aunt and uncle always give me dolls on special occasions. Mi: Your dolls are all very different. Elena: Yes, theyre from all over the world! Nick: I dont know why girls collect things. Its a piece of cake. Mi: Do you have a difficult hobby, Nick? Nick: Yes, I enjoy mountain climbing. Mi: But Nick, there are no mountains around here! Nick: I know. Im in a mountain climbing club. We travel to mountains around Viet Nam. In the future, Ill climb mountains in other countries too. GỢI Ý: Mi visit Nick and Elena's house. She comes to Elena's room and sees ...