求万能作文结尾

These days we often hear that ( 1 ). It i common that ( 2 ).
Why does such circumstance occur in spite of social protects? For one thing ,( 3 ). For another,( 4 ). What is more, since ( 5 ),it is natural that ( 6 ). To solve the problem is not easy at all ,but is worth trying .
We should do something such as ( 7 ) to improve he present situation ,and i do believe everything will be better in the future .
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括号里的东西自己填，e.g：
pollution of environment
??These days we often hear that (our living conditions are getting more and more serious because of the destruction of our environment ).It is common that (many trees and animals are near extinction, and the all-important food chain has been destroyed .).
??Why does such circumstance occur in spite of social protects? For one thing ,(the population of the world is increasing so rapidly that the world has been so crowded. ).For another,(the overuse of n