单项选择题

Questions 6 and 8 are based on the following news. At the end of the news item, you will be given 10 seconds to answer each question.
Now listen to the news.
Why did NASA decide to bring the shuttle home earlier

A．The laboratory was closed.
B．The generator was turned off.
C．The power generator might explode.
D．Electricity was going to run out.

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Questions 6 and 8 are based on the following news. At the end of the news item, you will be given 10 seconds to answer each question. Now listen to the news. Why did NASA decide to bring the shuttle home earlier 您的浏览器不支持 audio 元素。