He paid the boy $10 for washing ten windows,most of ( D) hadn't been cleaned for at least a year.

问题描述:

He paid the boy $10 for washing ten windows,most of ( D) hadn't been cleaned for at least a year.
A.these B.those C.thatDwhich
为什么不用those?怎样判断是用these,that等代词还是用which等关系代词?

固定短语:most of those是大多数人,most of these是大多数的这些.that和which一般指单数(某个或者前文中已经指定的某一个特定的部分),结合前后语境,明显在这句里不适用.