Whether the buildings in this area should be pulled down has remained ; people are still looking for other possible solutions.
A. unchallenged
B. relevant
C. controversial
D. contradictory
网友回答
A. unchallenged
B. relevant
(答案→)C. controversial
D. contradictory
解析：考查形容词辨析。难度中等。
【解题思路】句意为：这些建筑是否要推倒仍然有争议，人们仍然在寻找其它可能的解决方法。C项意为“有争议的”，符合句意；A项意为“不改变的”，B项意为“相关的”，D项意为“矛盾的”，都与语意不符。