单项选择题

A．Living things.
B．Living things and nonliving things.
C．The environmental problems caused by industry and people.
D．The interrelationship of living things to their environment.
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单项选择题
A．Secretary and Boss.B．Teacher and StudentC．Customer and Librarian.D．Customer and Salesman;
A．Secretary and Boss.
B．Teacher and Student
C．Customer and Librarian.
D．Customer and Salesman;
填空题
From the advertisement, we can infer that if yon join the club, your figure______.
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