单项选择题

To give you a general idea of our products, we enclose the catalogues showing various products handled by us with detailed ______ and means of packing.

A．specimens
B．inspections
C．samples
D．specifications
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单项选择题
To survive in the intense trade competition between countries, we must ______ the qualities and varieties of products we make to the world market demand.
A．improve
B．enhance
C．guarantee
D．gear
单项选择题
Christmas is a Christian holy day usually celebrated on December 25th ______ the birth of Jesus Christ.
A．in accordance with
B．in terms of
C．in favor of
D．in honor of
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