教学情境分析题根据题目要求完成下列任务，用中文作答。下面是某堂课的教学材料。Betty: Hi Mum, can you hear me?Mum: Yes, I can. Where are you?Betty: I'm standing on the Great Wall of China and talking to you.Mum: Really?Betty: We're on a school trip and we're having a good time.Mum: That's great, Betty. What are the others doing?Betty: Well, Tony is eating an ice cream, and Lucy is buying some presents and postcards. And Tom is eating lunch and lying in the sun.Well, Tony is eating an ice cream, Wang Hui is taking lots of pictures and Lingling is buying some presents and postcards. And Daming is eating lunch and lying in the sun. Mum: Can you send me a postcard too?Betty: Yes. Lingling and I are writing postcards. We're enjoying the school trip a lot. Anyway, we're going home now. Bye!Mum: Bye-bye, Betty!根据上面的信息，从下面三个方面作答: