单项选择题

A．A platform worker.
B．The command spot.
C．A computer.
D．A machine.
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单项选择题
A．Before it gets colder.B．Before it gets warmer.C．Before it becomes windy.D．Before wet weather comes.
A．Before it gets colder.
B．Before it gets warmer.
C．Before it becomes windy.
D．Before wet weather comes.
填空题
shelves
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