单项选择题

A．Attracting mates.
B．Staking their territories.
C．Hearing each other.
D．Sleeping.
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单项选择题
A．She has been studying late into night all week.B．She has made plans to work late all week.C．She has not been free to go out with Abruzzi all week.D．She has been busy tidying up her apartment all week.
A．She has been studying late into night all week.
B．She has made plans to work late all week.
C．She has not been free to go out with Abruzzi all week.
D．She has been busy tidying up her apartment all week.
单项选择题
A．The problem of lacking a mirror.B．The problem of lacking a decoration for the lift.C．A psychological problem.D．A material problem.
A．The problem of lacking a mirror.
B．The problem of lacking a decoration for the lift.
C．A psychological problem.
D．A material problem.
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