Many of the crimes have gone___,because some people dare not report them to the police.
问题描述：
Many of the crimes have gone___,because some people dare not report them to the police.
A unnoticing B unnoticed C to be unnoticed D to have been unnoticed.为何要选B
Mr Alexander is the professor_____I have the greatest respect.
A who B that C to whom D for whom为何要选D.请您说详细点.
答
B.unnoticed 去分词做后置定语,同时表示过去和被动
D.for whom 固定短语have respect for sb.尊敬[重]/重视某个人
本句是个定语从句,介词for前置了,whom放在介词for的后面充当宾语