单项选择题


In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
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