Thismachine, 国语站 题库 1.1W 大中小设置文字大小 问题详情:This machine, ______for many years, is still working perfectly.A. after which I have looked B. which I have looked afterC. that I have looked after D. I have looked after【回答】B. which I have looked after 构成一个非限制*定语从句.知识点:定语从句题型:选择题 TAG标签:Thismachine #