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．Because she is going to study abroad.B．Because she is going to get married.C．Because she asked him for it.D．Because Christmas is coming.
A．Because she is going to study abroad.
B．Because she is going to get married.
C．Because she asked him for it.
D．Because Christmas is coming.
填空题
According to the advertisement, every day HRC offers about______.
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