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.
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单项选择题
A．The government officials.B．The factory owners.C．The criminals.D．The poor and immigrants.
A．The government officials.
B．The factory owners.
C．The criminals.
D．The poor and immigrants.
单项选择题
A．No fuel.B．Ice on the wing.C．Engine trouble.D．No food.
A．No fuel.
B．Ice on the wing.
C．Engine trouble.
D．No food.
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