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
网友回答
A解析句意：这些调查显示很多犯罪活动警方并没有记录，原因是并非所有的受害者都报案。过去分词unrecorded作系动词go的表语。