police have put up posters around the city with photos of the manthey————.选择在补充A.are seeking B.havebeen seeking.请达人附解释,感激不尽

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police have put up posters around the city with photos of the manthey————.选择在补充A.are seeking B.havebeen seeking.请达人附解释,感激不尽

police have put up posters around the city with photos of the manthey————.选择在补充A.are seeking B.havebeen seeking.请达人附解释,感激不尽
police have put up posters around the city with photos of the manthey————.选择在补充
A.are seeking B.havebeen seeking.请达人附解释,感激不尽

police have put up posters around the city with photos of the manthey————.选择在补充A.are seeking B.havebeen seeking.请达人附解释,感激不尽
B
首先看时态,主句和从句保持一致,都是完成时
再看从句,意为“警察一直以来都在寻找的”,表示从寻找这个动作开始到现在一直在进行,故选完成进行时