单项选择题

Questions 28 to 30 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. The US border with Canada is the ______ in the world.

A．longest coastal border
B．longest defended border
C．longest undefended border
D．longest undefined border

<上一题目录下一题>

热门试题

单项选择题

单项选择题

Questions 28 to 30 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. The US border with Canada is the ______ in the world. 您的浏览器不支持 audio 元素。