单选题 Questions 21 and 22 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions. Now, listen to the news.

单选题 What did NASA's Constellation Programme originally plan to do?

A、 To set up a moon colony by 2020.
B、 To send astronauts again to the moon by 2020.
C、 To continue the current shuttle missions till 2020.
D、 To create more jobs for NASA fill 2020.

【正确答案】 B

【答案解析】NASA's Constellation Program过去已经为在2020年前再次把宇航员送上月球而努力。B正确。NASA's Constellation Program虽然也打算研究建立月球殖民地，但是并没有说他们打算在2020年前建立月球殖民地．所以选项A错误。

单选题 NASA's Constellation Programme would be cancelled mainly because

A、 there were more important space missions.
B、 the space agency lacked funding for the programme.
C、 the current shuttle missions would continue.
D、 Congress failed to pass President Obama's budget.

【正确答案】 A

【答案解析】新闻最后提到，即使有足够的资金资助，NASA's Constellation Program再次送宇航员上月球的方案根本就没有其他一些潜在的替代方案那样有吸引力。可见，取消该方案虽然有资金缺乏的原因，但最主要的原因是有比它更重要的方案．所以A正确。