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单项选择题


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.
What leads the policeman to believe that Mr. Simpson didn’t drink alcohol before driving

A.A breathalyzer test.
B.A blood test.
C.The certainty of his claim.
D.No smell of wine in his breath.
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