单项选择题

Questions 28 to 30 are based on the passage you have just heard.

A．Professionals.
B．College students.
C．Beginners.
D．Intermediate learners.
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单项选择题
A．Because he was a white man. B． Because he was inexperienced. C．Because he was too lazy. D．Because he was a black man.
A．Because he was a white man.
B． Because he was inexperienced.
C．Because he was too lazy.
D．Because he was a black man.
单项选择题
A．Under the age of four.B． Under the age of fiveC． Under the age of six.
A．Under the age of four.
B． Under the age of five
C． Under the age of six.
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