In this section you will hear everything ONCE ONLY. Listen
carefully and then answer the questions that follow. Mark the correct answer to
each question on your coloured answer
sheet. Questions 1 to 5 are based on an interview
with an expert on education. At the end of the interview you will be given 10
seconds to answer each of the following five questions. Now
listen to the interview From where could boys and girls learn about sexual problems in America
A．From parents. B．From PE classes. C．From health classes. D．All of the above.