1.The change in__________lalgely results from the fact that__________.
2.We may blame__________.but the 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 this situation.
7.This might contribute to/lead to/account for the phenomenon/ problem.
8.The answer to this problem involves many factors.
9.The phenomenon mainly stems from the fact that__________.
10.The factors that contribute to this situation include__________.
11.Perhaps the primary factor is that__________.
