Paper, one of the four greatest inventions in ancient China, _______

题型：单项选择难度：0.85 引用次数：1301 题号：13340736

Paper, one of the four greatest inventions in ancient China, ________by Cai Lun about 2, 000 years ago.

A．was invented

B．is invented

C．were invented

D．are invented

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更新时间：2021-07-04 15:53:16 |

【知识点】一般过去时的被动语态解读

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【推荐1】There’s a large library in Dalian. It ________ in 1907.

A．builds

B．built

C．is built

D．was built

2023-04-13更新 | 169次组卷

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【推荐2】Chopsticks ________ more than 3, 000 years ago.

A．are invented

B．were invented

C．invented

D．invents

2024-01-22更新 | 110次组卷

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【推荐3】At that time some boys ________ basketball on the playground.

A．were seen playing

B．were seen to play

C．saw to play

D．saw and played

2020-02-16更新 | 152次组卷

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