单项选择题


What do experts say about the earth’s fuel reserves

A．The earth’s fuel reserves will be accessible for the next 50 years．
B．There will soon be an energy crisis．
C．Conventional reserves will soon become inaccessible．
D．Fuel demand will decline．
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单项选择题
What is NOT the purpose of innovations that use satellite tracking and remote communica—tions
A．To prevent car thieves from getting into your car．
B．To call for help when one’s car crashes．
C．To call for help when the car gets jammed in the traffic．
D．To track the car down when it is being stolen．
单项选择题
Which of the following statements is NOT true according to the fourth and fifth paragraphs
A．Our biological clock resets itself automatically．
B．light gets through our eyes and resets our biological clock．
C．Our internal clock as well as the alarm clock can be reset automatically．
D．Our internal clock，like the alarm clock，can be reset．
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