单项选择题

A．A scarcity of jobs in their field.
B．Inadequate training in methods of biological research.
C．Difficulties in classifying all of the varieties of owls.
D．A lack of funding for their work with endangered species.
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单项选择题
A．In a railway station.B．In a bus terminal.C．In a hotel room.D．In a restaurant.
A．In a railway station.
B．In a bus terminal.
C．In a hotel room.
D．In a restaurant.
单项选择题
A．When they’re unable to control the person’s behavior.B．When the causes of the behavior are obvious.C．When the consequences of the behavior are unpleasant.D．When the behavior is expected.
A．When they’re unable to control the person’s behavior.
B．When the causes of the behavior are obvious.
C．When the consequences of the behavior are unpleasant.
D．When the behavior is expected.
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