中科新闻网北极星和天狼星bnike:高中英语
来源：百度文库 编辑：中科新闻网 时间：2024/05/10 08:57:33
He paid the boy 10 for washing ten windows ,most of ____hadn't been cleaned for at least a year
which 定语从句中可代先行词也可代一个句子
which
them-----代指前文的窗户,most of them-----其中大多数
most of them hadn't been cleaned for at least a year 其中大多数(的窗户)至少一年没被清洁过.