补全对话

Peter:Hi, Sally. Come and have a look at my photos.

Sally:Are these the photos you took in Africa, Peter?

Peter:    1     Look, this is a wildebeest. It's an animal in Africa.

Sally:    2    

Peter:No, it doesn't. It only eats grass.

Sally:Are there a lot of animals in Africa?

Peter:   3    

Sally:Oh, this photo looks interesting. What are you doing there?

Peter:    4    

Sally:Did you have a good time there?

Peter:Ofcourse.    5