单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．He is starting the course late.
B．The subject is diffieun for him.
C．The professor is very reserved.
D．The book is difficult to rea
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单项选择题
A．The history of Benjamin Franklin.B．The history of the U.S. mail.C．The Changes of writing letters.D．The history of U. S.
A．The history of Benjamin Franklin.
B．The history of the U.S. mail.
C．The Changes of writing letters.
D．The history of U. S.
单项选择题
A．Forgetful.B．Lazy.C．Careful.D．Serious.
A．Forgetful.
B．Lazy.
C．Careful.
D．Serious.
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