单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Now, listen to the passage.
The Suez Canal is mentioned as an example of a

A．modern canal.
B．water level canal.
C．lock canal.
D．irrigation canal.

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单项选择题

单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. The Suez Canal is mentioned as an example of a 您的浏览器不支持 audio 元素。