单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage.
Whom does the speaker mention as likely plagiarizers

A．Research assistants.
B．Magazine publishers.
C．Unscrupulous authors.
D．Inexperienced students.

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单项选择题

单项选择题

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage. Whom does the speaker mention as likely plagiarizers 您的浏览器不支持 audio 元素。