Lead accumulation worldwide decreased significantly after the use of unleaded gas in the US ______.

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• 第1题：

  
  A、5:30
  A、m.
  B．7:45
  A、m.
  C．5:30 p.m.
  D．7:45 p.m.
  

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• 第2题：

  Every day 25 million US children ride school buses. The safety record for these buses is much better than for passenger cars; but nevertheless, about 10 children are killed each year riding on large school buses, and nearly four times that number are killed outside buses in the loading zones.By and large, however, the nation’s school children are transported to and from school safely.
  Even though the number of school bus casualties (伤亡事故) is not large, the safety of children is always of i

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• 第3题：

  Questions 22 to 25 are based on the conversation you have just hearD、 A．The size of the daily newspaper.
  B．The staff of the daily newspaper.
  C．The circulation of the daily newspaper.
  D．The advertisements in the daily newspaper.
  

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• 第4题：

  Passage Three
  Questions 32 to 35 are based on the passage you have just hearD、 A．Make long road or rail tunnels safer.
  B．Make long road or rail tunnels easier.
  C．Make long road or rail tunnels quicker.
  D．Make long road or rail tunnels more efficient.
  

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• 第5题：

  Why do some Japanese parents send their children to university-based kindergartens
  A．They can do better in their future studies.
  B．They can accumulate more group experience there.
  C．They can be individually oriented when they grow up.
  D．They can have better chances of getting a first-rate education.
  

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