题目内容
【题目】Paper________ by Cai Lun in China about 2000 years ago.
A. can be invented B. is invented
C. will be invented D. was invented
【答案】D
【解析】
句意:2000年前蔡伦发明了纸。根据 about 2000 years ago可知是过去时态;故选D.
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题目内容
【题目】Paper________ by Cai Lun in China about 2000 years ago.
A. can be invented B. is invented
C. will be invented D. was invented
【答案】D
【解析】
句意:2000年前蔡伦发明了纸。根据 about 2000 years ago可知是过去时态;故选D.