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.
What measure was taken against floods in London in the 1960s

A．50 underground stations were made waterproof.
B．A flood wall was built.
C．An alarm system was set up.
D．Rescue teams were formed.

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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. What measure was taken against floods in London in the 1960s 您的浏览器不支持 audio 元素。