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__________.