单项选择题

Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation.
According to this conversation, "textbook" is ______ .

A．close form compound noun
B．hyphenated form compound noun
C．open form compound noun
D．not a Compound noun

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单项选择题

问答题

Questions 4 to 6 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now, listen to the conversation. According to this conversation, "textbook" is ______ . 您的浏览器不支持 audio 元素。