单项选择题

A．A teacher.
B．A psychologist.
C．A librarian.
D．A publisher.
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单项选择题
A．Professor Paulson has retired.B．The courses may not be so good now,C．The course is definitely worthwhile,D．Professor Paulson doesn’t understand astrophysics.
A．Professor Paulson has retired.
B．The courses may not be so good now,
C．The course is definitely worthwhile,
D．Professor Paulson doesn’t understand astrophysics.
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