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閱讀下面的短文，并根據短文內容和插圖提示，在短文空格處填入適當的單詞，每個空只能填寫一個形式正確、意義相符的單詞。

  Computer plays an important part in our everyday life．It is one of the greatest （71）_________

in the world in the twentieth century．It works for us not only at home，in the offices and in big shops，（72）__________ also at schools．Today it is used（73）__________ many ways．It really（74）__________ large wealth（財富）and happiness to the world．

The first computer in the world was（75）__________ Enid．It was built in America in 1946．It was（76）__________ and heavy．（77）__________ it was born，it has been developing very fast．Until now it has gone through four periods（時期，階段）and changed a lot．There’re many kinds of computers．Computers are getting smaller and smaller and computing faster and faster．It becomes more and more helpful．

The computer can do most of the things（78）__________ the people．It can help us know about the real world more quickly, learn（79）___________ we want to learn and think for ourselves.（80）__________ a student in the twenty-first century, you must work hard at it．

六、讀寫綜合 (本大題分為A、B兩部分，共20分)