A-A+
About the sixth century A. D. when few Europea
问题详情
About the sixth century A. D. when few Europeans could read, the Chinese ______ paper.
A．invented
B．had invented
C．have invented
D．had been invented
参考答案
正确答案：B
解析：本题测试过去完成时的用法。本句强调过去的过去，又因为是主动关系，所以B是正确答案。本句的意思是：“大约在公元6世纪欧洲人几乎还不会阅读的时候，中国人已经发明了造纸术。”
