单项选择题

Questions 19—22 are based on the following passage. You now have 20 seconds to read the questions 19—22.
What is the speaker mainly talking about

A．Three groups of learners.
B．The importance of business English.
C．Features of English for different purposes.
D．English for Specific Purposes.

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单项选择题

Questions 19—22 are based on the following passage. You now have 20 seconds to read the questions 19—22. What is the speaker mainly talking about 您的浏览器不支持 audio 元素。