单项选择题

Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions.
Now listen to the news.
Tile Chinese government plans to buy at least ______ new models of Boeing’s 737 aircraft.

A．thirty
B．thirteen
C．sixteen
D．fifty

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单项选择题

单项选择题

Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now listen to the news. Tile Chinese government plans to buy at least ______ new models of Boeing’s 737 aircraft. 您的浏览器不支持 audio 元素。