问题描述：
The place _______ the bridge is supposed to be built should be ________the
A.which; where B.at which; which C.at which; where D.which; in which
选哪个,说说理由
A.which; where B.at which; which C.at which; where D.which; in which
选哪个,说说理由
问题解答：
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