【题目】By 16：30, was almost closing time, nearly all the paintings had been sold out.
A. which B. when
C. what D. that
在线课程【答案】A
【解析】试题分析：考查从句，从句was almost closing time, nearly all the paintings had been sold缺少主语，所以在关系代词里选择，that不能引导非限制性定语从句，what表示…的东西，所以选A；句子意思“到17:30是关门时间，所有的画几乎被卖完了”