题目内容：

There have been many great inventions.One of the first greatest inventions is still very important

优质解答

been 是错的,应该是:they have made many great inventions
意思是:他们有许多伟大的发明
One of the first greatest inventions is still very important.
这些伟大发明中最早的一项现在仍然非常重要