2. 职称英语
  3. By the sixth century AD, when few Europeans could read, the Chinese ______ paper

By the sixth century AD, when few Europeans could read, the Chinese ______ paper

游客2025-03-17  14
问题 By the sixth century AD, when few Europeans could read, the Chinese ______ paper.
选项 A、invented
B、had invented
C、have invented
D、had been invented
答案 B
解析 时态用法。句中有表示过去的时间状语“sixth century AD”，而paper在此之前就已经发明了，表示“过去的过去”应该用过去完成时。
转载请注明原文地址:https://tihaiku.com/zcyy/4001121.html
相关试题推荐
随机试题
最新回复(0)