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.
According to Judy, What did her professor photograph

A．Oceanic snails.
B．Large green jellyfish.
C．Different planktonic plants.
D．Sunken treasure chests.

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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. According to Judy, What did her professor photograph 您的浏览器不支持 audio 元素。