用所给词的适当形式填空
1.Will books be _________ (replace) by computers?
2.Information can be _________ (store) on the computer.
3.The ________ (print) is one of the greatest
inventions.
4.The _________ (introduce) of the Internet has changed our life a lot.
5.Railways are important to the economic ________ (develop) of a country.