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
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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
单项选择题
Language, culture, and personality may be considered （）of each other in thought, but they are inseparable in fact.

A．indistinctly
B．separately
C．irrelevantly
D．independently
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