单项选择题

I was asked the other day whether high and low pressure systems were ______ the central pressure.

A. maintained to
B. determined by
C. generated within D. preserved to
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单项选择题
The planes were delayed and the hotel was awful, but ______ we still had a good time.
A. on the contrary

B. by the same token
C. on top of all that

D. for all that
单项选择题
Every man in this country has the right to live where he wants to ______ the color of his skin.
A. with the exception of

B. in the light of
C. by virtue of

D. regardless of
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