Paper，one of the four greatest inventions in ancient China，________by Cai Lun about 2，000 years ago.（　?。?/h1>

A．was invented	B．is invented
C．were invented	D．a(chǎn)re invented

【答案】A

【解答】

【點(diǎn)評】

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發(fā)布：2024/12/27 14:0:2組卷：135引用：5難度：0.8

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A．plant	B．a(chǎn)re planted
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C．is produced	D．was produced

Paper，one of the four greatest inventions in ancient China，________by Cai Lun about 2，000 years ago.（ ?。?/h1>