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.
单项选择题
Has the company devised an escape system and fire fighting procedures so far
A．Yes, the company has done so because it is an order.
B．Of course, the company has done so although it is reluctant.
C．No, the company has not yet done it.
D．We could not judge from the passage.
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