单项选择题


Questions 11 to 18 are based on the conversation you have just heard.

A．At 5:00.
B．At 5:30.
C．At 4:30.
D．At 4:00.
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The U.S. government and some of the American people believe that reducing America’s dependence on foreign petroleum is one of the reasons to start research into the possibility of using ethanol.
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