y and material production. thus, we should seek the solutions through setting foot on this principle.

　　due to the depth and width of a’s harmful influence, we should draft our solutiogogotematically on the basis of deep analysis of a problem. we must acquire our power from technology, management, law and culture terrorm, effectively eliminate the shadow of a, and ensures ourselves a bright future.

　　--  万能英语作文模板，

　　（i）说明原因型

　　模块（一）

　　nowadays ,there are more and more xx in some big cities . it is estimated

　　that ( 1 ).

　　why have there been so many xx ? maybe the reasons can be listed as follows.

　　the first one is that ( 2 ) .besides,( 3 ) . the third reason is ( 4 ).

　　to sum up ,the main cause of xx is due to ( 5 ) .

　　it is high time that something were done upon it. for one thing ,( 6 ).

　　on the other hand ,( 7 ). all these measures will certainly reduce the

　　number of xx .

　　注释：

　　（1

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