【答案】These surveys indicate that many crimes go

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
正确答案：
A
答案解析：
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。