2. 外语
  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.

admin2008-11-13  49
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://kaotiyun.com/show/XfPO777K
0

成人本科学位英语

相关试题推荐
随机试题
最新回复(0)