A
These changes only became possible as my memory improved．First it was stored in tubes，then on transistors and later on very small chips．As a result I totally changed my shape．As I have grown older I have also grown smaller．1．________And my memory became so large that even I couldn't believe it！But I was always so lonely standing there by myself，until in the early 1960s
they gave me a family connected by a network．I was able to share my knowledge with others through the World Wide Web．
Since the 1970s many new applications have been found for me．I have become very important in communication，finance and trade．2．________I have even been put into space rockets and sent to explore the Moon and Mars．3．________I am no wtruly filled with happiness that I am a devoted friend and helper of the human race！
B
Many musicians meet and forma band because they like to write and play their own music．4．________Sometimes they may play to passers-by in the street or subway so that they can earn some extra money for themselves or to pay for their instruments．5．________Of course they hope to make records in a studio and sell millions of copies to become millionaires！