单项选择题

Questions 3 to 6 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.
What are the speakers mainly discussing

A．A chemistry assignment.
B．A study that their chemistry professor did.
C．A class that the woman is taking.
D．A job possibility.

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单项选择题

单项选择题

Questions 3 to 6 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. What are the speakers mainly discussing 您的浏览器不支持 audio 元素。