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英语填空题用下列所给词语的适当形式填空clean develop introduce invent produce sp

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英语填空题
用下列所给词语的适当形式填空
clean develop introduce invent produce spread use write
From about 500 BC,pens _________ for writing.The feathers of large birds _________ and dried.The point of each feather was sharpened.Then people used them to write with ink.Many famous works,such as Shakespeare's,__________ with these pens.Then,in the 18th century,a pen with a steel writing point __________ .Only a few words could __________ ,however,before the writer had to fill the pen with ink again.Many years later,the fountain pen __________ from these early pens.In1950,a European invented the ballpoint pen.The popularity of writing ________ quickly with the ___________ of the ballpoint pen.Even today,ballpoint pens are much less expensive,compared with fountain pens.
众位想怎么答就怎么答,不过最好给个理由,
were used
were cleaned
were writen
was invented
be produced
introduced
spreaded
development
如果考试我就这样做了,感觉真的很难,有几个是蒙的~哈哈不要介意哈,仅供参考o(∩_∩)o...