【答案】These surveys indicate that many crimes go

题目：
These surveys indicate that many crimes go ___by the police mainly because not all victims report them. A . unrecorded B . to be unrecorded C . to have been unrecorded D . unrecording

答案：

A

解析：

这里主要是过去分词表动宾关系，故选A 翻译: 调查显示很多犯罪事实没有被警察纪录在案，主要因为很多受害人没有报案。