单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Delivery service manager and driver.
B．Teacher and student.
C．Lawyer and client.
D．Doctor and patient.

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单项选择题Why does the author use the phrase for next November (Line 3, Para. 1)

单项选择题The phrase immune to (Line 3, Para. 1) are used to mean ______.

Questions 11 to 18 are based on the conversation you have just heard. 您的浏览器不支持 audio 元素。