单项选择题

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now, listen to the conversation.
How many rooms concerned are there

A．2.
B．3.
C．4.
D．5.

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单项选择题

单项选择题

Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.Now, listen to the conversation. How many rooms concerned are there 您的浏览器不支持 audio 元素。