You will hear a theoretical biologist, Dr Nowak, being interviewed by a colleague about the evolution of language. For questions 1-5, choose the answer (A, B, C or D) which fits best according to what you hear.
1Dr Nowak is seeking to
2Dr Nowak iokes that mathematical biologists
3Why does the subject of language evolution attract Dr Nowak?
4What point is made about the significance of the evolution of language?
5The evolution of language has made what possible?