I wonder whether the police_____ that lost child or not.A have found B has been found C have been found D has found请告诉我选择的正确答案及原因,谢谢哦

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I wonder whether the police_____ that lost child or not.
A have found B has been found C have been found D has found
请告诉我选择的正确答案及原因,谢谢哦

D
police 此处做单数解
所以为has A错
B、C被动 错误,排除