In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow. Questions 11 to 14 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage. According to the speaker, where were the first bird’s nests located
A．On the ground. B．In cold places. C．On the highest branches of trees. D．Inside tree trunks.