21. The bus station, which most tourists would first visit, is _______ the city hall and the police station in the city.
(A) of opposite
(B) opposite of
(C) opposite to
(D) to opposite
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統計: A(9), B(74), C(151), D(13), E(0) #2297939
統計: A(9), B(74), C(151), D(13), E(0) #2297939