―When the pen ?―Sorry, I don't know. Maybe long long ago. A. did; invent B. was; inventedC. does; invent D. is; invented 题目和参考答案——青夏教育精英家教网—

题目内容

7. ―When_________ the pen__________ ？

―Sorry, I don't know. Maybe long long ago.
A. did; invent B. was; invented

C. does; invent D. is; invented

7. B考查被动语态。根据答语的时间是过去的时间可以确定时态为一般过去时，根据主语the pen和谓语invent之间存在被动关系可以确定用被动语态。

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