the inventions of the computer and the internet 使用have还是has?

In the second half of the 19th century many great inventions were made.翻译 The first part of the 20th century_____ more great inventions.A.saw B.appeared 应该选哪一个? Write an essay on the 20th century in terms of wars,inventions,political tension,actions and specific events. 求讲解.The first part of the 20th century saw more great inventions.二十世纪的第一部分可以看到更多伟大发明?主语是什么啊? There have been many great inventions.One of the first greatest inventions is still very important 英语作文:Computers--one of the most helpful inventions Which of the three inventions is_____(useful)one? The Four Great Inventions of Ancient China中文 Which of the following inventions can keep us warm? What are the different of discoveries and inventions?急, The computer was one of the most important inventions of last computer Some of the inventions of China are_____ show at the exhibition 填一个适当介词 Inside was an exhibition of the most up-to-date inventions of the 31st century. The bicycle is one of the simplest yet most useful inventions in the world.怎么翻译? The computer is one of the greatest inventions in the __ century.(twenty) The computer is one of the greatest inventions in the __ century.(twenty) the inventions of the computer and the internet 使用have还是has? afterschool of the 5th