Questions 12 to 15 are based on the conversation you have just heard.

单项选择题A．To study the daily schedule of the songbird.B．To discover the relationship between the courtship and dance.C．To research how the dance was invented.D．To find more songbirds dances.

单项选择题A．They always get lost when they go out.B．They talk too much and too fast.C．They know a lot of different things.D．They often stop talking in the middle of the conversation.