单项选择题

A．Oil electricity and labor.
B．Coal, oil and iron.
C．Materials and production.
D．Trained college graduates.
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单项选择题
A．Submarines.B．Ships and planes.C．Trains and cars.D．Florida and Boston.
A．Submarines.
B．Ships and planes.
C．Trains and cars.
D．Florida and Boston.
单项选择题
A．She often stays up late to read.B．The man should spend more time studying.C．The man manages with surprisingly little sleep.D．She has no idea what will be on the test.
A．She often stays up late to read.
B．The man should spend more time studying.
C．The man manages with surprisingly little sleep.
D．She has no idea what will be on the test.
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