语法填空
Betty：Hi, Mum!
Mum：Hello, Betty! Where are you now?
Betty: I'm____ (stand) on the Great Wall of China and____ (talk) to you. Mum：Really? That's great.
Betty：We're on a school trip.
Mum: What about the____(other)? Are they with you?
Betty: Well, right now Tony is ____(eat) a delicious ice cream. Wang Hui is ____take) lots of photos. Daming ____(have) lunch in the sun. And just now Lingling _____(buy) a few presents and postcards. Because they ____(be) on sale in the shop.
Mum: I'd like a postcard too, and please take some photos of the Great Wall and send____(they) to me by email.
Betty: OK. We're enjoying the school trip a lot. Anyway, it's time____(go) back to school now. Bye, Mum!
Mum：Bye, Betty!
