单项选择题

Now many manufacturers build their business reputations by enclosing ______ in the new products in case of damage in shipment or by incorrect operation.

A．categories
B．accessories
C．analogies
D．observatories
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For fear of being scolded by the teacher, the boy gave a ______ excuse for his absence.
A．liberal
B．temporary
C．lame
D．disabled
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The coat is not made of real silk; it is only a an ______ .
A．illustration
B．imitation
C．exhibition
D．synthesis
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