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　　表示原因的句型 　　1.The change in__________lalgely results from the fact that__________. 　　2.We mayblame__________.butthe teal causes ale__________. 　　3.Part ofthe explanations for it iS that__________. 　　4.One ofthe most common factors/causes iS that__________. 　　5.Another contributing factor/cause is __________ . 　　6.A number of factors are accountable for mis situation. 　　7.This might contribute to/lead to/account for the phenomenon/ problem. 　　8.The answer to this problem involves many factors. 　　9.The Dhenomenon mainly stems from the fact that__________. 　　10.The factors that contribute to this situation include__________. 　　11.Perhaps the primary factor is that__________.