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 the urban problem. At the end of the interview you will be given I0 seconds to answer each of the following five questions.
Now listen to the interview.
The reasons why the immigrants cannot work in industry are the following, except______.

A．Marine sediments have allowed scientists to amass evidence tending to confirm that astronomical cycles drive the Earth’s glacial cycles.
B．The ratio between two different isotopes of oxygen in seawater correlates closely with the size of the Earth’s ice sheets.
C．Surprisingly, single-cell marine organisms provide a record of the Earth’s ice ages.
D．The Earth’s astronomical cycles have recently been revealed to have an unexpectedly large impact on the Earth’s climate.