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¡¡¡¡1£©It is important£¨necessary£¬difficult£¬convenient£¬ possible£©for sb£®to do sth£®
¡¡¡¡2£©We think it necessary to do sth£®
¡¡¡¡3£©It plays an important role in our life£®
¡¡¡¡ÀýÈ磺
¡¡¡¡Computers are now being used everywhere£¬whether in the government£¬ in schools or in business£®Soon£¬ computers will be found in every home£¬ too£® We have good reason to say that computers are playing an increasingly important role in our life and we have stepped into the Computer Age£®

¡¡¡¡5£®±íʾ´ëÊ©
¡¡¡¡1£©We should take some effective measures£®
¡¡¡¡2£©We should try our best to overcome£¨conquer£©the difficulties£®
¡¡¡¡3£©We should do our utmost in doing sth£®
¡¡¡¡4£©We should solve the problems that we are confronted£¨faced£©with£®
¡¡¡¡ÀýÈ磺
¡¡¡¡The housing problem that we are confronted with is becoming more and more serious£® Therefore£¬we must take some effective measures to solve it£®

¡¡¡¡6£®±íʾ±ä»¯
¡¡¡¡1£©Some changes have taken place in the past five years£®
¡¡¡¡2£©A great change will certainly be produced in the world¡¯s communications£®
¡¡¡¡3£©The computer has brought about many changes in education£®
¡¡¡¡ÀýÈ磺
¡¡¡¡Some changes have taken place in people¡¯s diet in the past five years£® The major reasons for these changes are not far to seek£®Nowadays£¬ more and more people are switching from grain to meat for protein£¬ and from fruit and vegetable to milk for vitamins£®

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