Gunpowder is generally believed __________ in ancient China. A．to have invented B．being invented C．t...
2023-02-03 22:22:34 59次 20102011浙江瑞安中学高二下学期期末考试英语试题 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Gunpowder is generally believed __________
in ancient China.
|
A．to have invented
|
B．being invented
|
C．to have been invented
|
D．having invented
|
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