单项选择题

A．Friends.
B．A police officer and an investigator.
C．Two police officers.
D．A police officer and a program hostess.
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单项选择题
A．Her taking improper sleeping medications.B．Her having unusual stress lately.C．Her having a poor digestion.D．Her having insufficient physical activities.
A．Her taking improper sleeping medications.
B．Her having unusual stress lately.
C．Her having a poor digestion.
D．Her having insufficient physical activities.
单项选择题
A．Separate houses were built for storing ice.B．Double walls were built in icehouses to keep cool.C．Blocks of ice were packed with hay in icehouses.D．Ice was put into icehouses in winter.
A．Separate houses were built for storing ice.
B．Double walls were built in icehouses to keep cool.
C．Blocks of ice were packed with hay in icehouses.
D．Ice was put into icehouses in winter.
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